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-<section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         version="5.0"
-         xml:id="sec-release-18.03">
- <title>Release 18.03 (“Impala”, 2018/04/04)</title>
-
- <section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         version="5.0"
-         xml:id="sec-release-18.03-highlights">
-  <title>Highlights</title>
-
-  <para>
-   In addition to numerous new and upgraded packages, this release has the
-   following highlights:
-  </para>
-
-  <itemizedlist>
-   <listitem>
-    <para>
-     End of support is planned for end of October 2018, handing over to 18.09.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     Platform support: x86_64-linux and x86_64-darwin since release time (the
-     latter isn't NixOS, really). Binaries for aarch64-linux are available, but
-     no channel exists yet, as it's waiting for some test fixes, etc.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     Nix now defaults to 2.0; see its
-     <link xlink:href="https://nixos.org/nix/manual/#ssec-relnotes-2.0">release
-     notes</link>.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     Core version changes: linux: 4.9 -> 4.14, glibc: 2.25 -> 2.26, gcc: 6 ->
-     7, systemd: 234 -> 237.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     Desktop version changes: gnome: 3.24 -> 3.26, (KDE) plasma-desktop: 5.10
-     -> 5.12.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     MariaDB 10.2, updated from 10.1, is now the default MySQL implementation.
-     While upgrading a few changes have been made to the infrastructure
-     involved:
-     <itemizedlist>
-      <listitem>
-       <para>
-        <literal>libmysql</literal> has been deprecated, please use
-        <literal>mysql.connector-c</literal> instead, a compatibility passthru
-        has been added to the MySQL packages.
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        The <literal>mysql57</literal> package has a new
-        <literal>static</literal> output containing the static libraries
-        including <literal>libmysqld.a</literal>
-       </para>
-      </listitem>
-     </itemizedlist>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     PHP now defaults to PHP 7.2, updated from 7.1.
-    </para>
-   </listitem>
-  </itemizedlist>
- </section>
-
- <section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         version="5.0"
-         xml:id="sec-release-18.03-new-services">
-  <title>New Services</title>
-
-  <para>
-   The following new services were added since the last release:
-  </para>
-
-  <itemizedlist>
-   <listitem>
-    <para>
-     <literal>./config/krb5/default.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./hardware/digitalbitbox.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./misc/label.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/ccache.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/criu.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/digitalbitbox/default.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/less.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/npm.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/plotinus.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/rootston.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/systemtap.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/sway.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/udevil.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/way-cooler.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/yabar.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./programs/zsh/zsh-autoenv.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/backup/borgbackup.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/backup/crashplan-small-business.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/desktops/dleyna-renderer.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/desktops/dleyna-server.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/desktops/pipewire.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/desktops/gnome3/chrome-gnome-shell.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/desktops/gnome3/tracker-miners.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/hardware/fwupd.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/hardware/interception-tools.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/hardware/u2f.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/hardware/usbmuxd.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/mail/clamsmtp.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/mail/dkimproxy-out.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/mail/pfix-srsd.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/misc/gitea.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/misc/home-assistant.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/misc/ihaskell.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/misc/logkeys.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/misc/novacomd.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/misc/osrm.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/misc/plexpy.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/misc/pykms.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/misc/tzupdate.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/monitoring/fusion-inventory.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/monitoring/prometheus/exporters.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/network-filesystems/beegfs.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/network-filesystems/davfs2.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/network-filesystems/openafs/client.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/network-filesystems/openafs/server.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/network-filesystems/ceph.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/networking/aria2.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/networking/monero.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/networking/nghttpx/default.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/networking/nixops-dns.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/networking/rxe.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/networking/stunnel.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/web-apps/matomo.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/web-apps/restya-board.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/web-servers/mighttpd2.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./services/x11/fractalart.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./system/boot/binfmt.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./system/boot/grow-partition.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./tasks/filesystems/ecryptfs.nix</literal>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>./virtualisation/hyperv-guest.nix</literal>
-    </para>
-   </listitem>
-  </itemizedlist>
- </section>
-
- <section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         version="5.0"
-         xml:id="sec-release-18.03-incompatibilities">
-  <title>Backward Incompatibilities</title>
-
-  <para>
-   When upgrading from a previous release, please be aware of the following
-   incompatible changes:
-  </para>
-
-  <itemizedlist>
-   <listitem>
-    <para>
-     <literal>sound.enable</literal> now defaults to false.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     Dollar signs in options under <option>services.postfix</option> are passed
-     verbatim to Postfix, which will interpret them as the beginning of a
-     parameter expression. This was already true for string-valued options in
-     the previous release, but not for list-valued options. If you need to pass
-     literal dollar signs through Postfix, double them.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The <literal>postage</literal> package (for web-based PostgreSQL
-     administration) has been renamed to <literal>pgmanage</literal>. The
-     corresponding module has also been renamed. To migrate please rename all
-     <option>services.postage</option> options to
-     <option>services.pgmanage</option>.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     Package attributes starting with a digit have been prefixed with an
-     underscore sign. This is to avoid quoting in the configuration and other
-     issues with command-line tools like <literal>nix-env</literal>. The change
-     affects the following packages:
-     <itemizedlist>
-      <listitem>
-       <para>
-        <literal>2048-in-terminal</literal> →
-        <literal>_2048-in-terminal</literal>
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        <literal>90secondportraits</literal> →
-        <literal>_90secondportraits</literal>
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        <literal>2bwm</literal> → <literal>_2bwm</literal>
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        <literal>389-ds-base</literal> → <literal>_389-ds-base</literal>
-       </para>
-      </listitem>
-     </itemizedlist>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <emphasis role="strong"> The OpenSSH service no longer enables support for
-     DSA keys by default, which could cause a system lock out. Update your keys
-     or, unfavorably, re-enable DSA support manually. </emphasis>
-    </para>
-    <para>
-     DSA support was
-     <link xlink:href="https://www.openssh.com/legacy.html">deprecated in
-     OpenSSH 7.0</link>, due to it being too weak. To re-enable support, add
-     <literal>PubkeyAcceptedKeyTypes +ssh-dss</literal> to the end of your
-     <option>services.openssh.extraConfig</option>.
-    </para>
-    <para>
-     After updating the keys to be stronger, anyone still on a pre-17.03
-     version is safe to jump to 17.03, as vetted
-     <link xlink:href="https://search.nix.gsc.io/?q=stateVersion">here</link>.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The <literal>openssh</literal> package now includes Kerberos support by
-     default; the <literal>openssh_with_kerberos</literal> package is now a
-     deprecated alias. If you do not want Kerberos support, you can do
-     <literal>openssh.override { withKerberos = false; }</literal>. Note, this
-     also applies to the <literal>openssh_hpn</literal> package.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>cc-wrapper</literal> has been split in two; there is now also a
-     <literal>bintools-wrapper</literal>. The most commonly used files in
-     <filename>nix-support</filename> are now split between the two wrappers.
-     Some commonly used ones, like
-     <filename>nix-support/dynamic-linker</filename>, are duplicated for
-     backwards compatability, even though they rightly belong only in
-     <literal>bintools-wrapper</literal>. Other more obscure ones are just
-     moved.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The propagation logic has been changed. The new logic, along with new
-     types of dependencies that go with, is thoroughly documented in the
-     "Specifying dependencies" section of the "Standard Environment" chapter of
-     the nixpkgs manual.
-<!-- That's <xref linkend="ssec-stdenv-attributes"> were we to merge the manuals. -->
-     The old logic isn't but is easy to describe: dependencies were propagated
-     as the same type of dependency no matter what. In practice, that means
-     that many <function>propagatedNativeBuildInputs</function> should instead
-     be <function>propagatedBuildInputs</function>. Thankfully, that was and is
-     the least used type of dependency. Also, it means that some
-     <function>propagatedBuildInputs</function> should instead be
-     <function>depsTargetTargetPropagated</function>. Other types dependencies
-     should be unaffected.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>lib.addPassthru drv passthru</literal> is removed. Use
-     <literal>lib.extendDerivation true passthru drv</literal> instead.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The <literal>memcached</literal> service no longer accept dynamic socket
-     paths via <option>services.memcached.socket</option>. Unix sockets can be
-     still enabled by <option>services.memcached.enableUnixSocket</option> and
-     will be accessible at <literal>/run/memcached/memcached.sock</literal>.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The <varname>hardware.amdHybridGraphics.disable</varname> option was
-     removed for lack of a maintainer. If you still need this module, you may
-     wish to include a copy of it from an older version of nixos in your
-     imports.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The merging of config options for
-     <varname>services.postfix.config</varname> was buggy. Previously, if other
-     options in the Postfix module like
-     <varname>services.postfix.useSrs</varname> were set and the user set
-     config options that were also set by such options, the resulting config
-     wouldn't include all options that were needed. They are now merged
-     correctly. If config options need to be overridden,
-     <literal>lib.mkForce</literal> or <literal>lib.mkOverride</literal> can be
-     used.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The following changes apply if the <literal>stateVersion</literal> is
-     changed to 18.03 or higher. For <literal>stateVersion = "17.09"</literal>
-     or lower the old behavior is preserved.
-    </para>
-    <itemizedlist>
-     <listitem>
-      <para>
-       <literal>matrix-synapse</literal> uses postgresql by default instead of
-       sqlite. Migration instructions can be found
-       <link xlink:href="https://github.com/matrix-org/synapse/blob/master/docs/postgres.rst#porting-from-sqlite">
-       here </link>.
-      </para>
-     </listitem>
-    </itemizedlist>
-   </listitem>
-   <listitem>
-    <para>
-     The <literal>jid</literal> package has been removed, due to maintenance
-     overhead of a go package having non-versioned dependencies.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     When using <option>services.xserver.libinput</option> (enabled by default
-     in GNOME), it now handles all input devices, not just touchpads. As a
-     result, you might need to re-evaluate any custom Xorg configuration. In
-     particular, <literal>Option "XkbRules" "base"</literal> may result in
-     broken keyboard layout.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The <literal>attic</literal> package was removed. A maintained fork called
-     <link xlink:href="https://www.borgbackup.org/">Borg</link> should be used
-     instead. Migration instructions can be found
-     <link xlink:href="http://borgbackup.readthedocs.io/en/stable/usage/upgrade.html#attic-and-borg-0-xx-to-borg-1-x">here</link>.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The Piwik analytics software was renamed to Matomo:
-     <itemizedlist>
-      <listitem>
-       <para>
-        The package <literal>pkgs.piwik</literal> was renamed to
-        <literal>pkgs.matomo</literal>.
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        The service <literal>services.piwik</literal> was renamed to
-        <literal>services.matomo</literal>.
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        The data directory <filename>/var/lib/piwik</filename> was renamed to
-        <filename>/var/lib/matomo</filename>. All files will be moved
-        automatically on first startup, but you might need to adjust your
-        backup scripts.
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        The default <option>serverName</option> for the nginx configuration
-        changed from <literal>piwik.${config.networking.hostName}</literal> to
-        <literal>matomo.${config.networking.hostName}.${config.networking.domain}</literal>
-        if <option>config.networking.domain</option> is set,
-        <literal>matomo.${config.networking.hostName}</literal> if it is not
-        set. If you change your <option>serverName</option>, remember you'll
-        need to update the <literal>trustedHosts[]</literal> array in
-        <filename>/var/lib/matomo/config/config.ini.php</filename> as well.
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        The <literal>piwik</literal> user was renamed to
-        <literal>matomo</literal>. The service will adjust ownership
-        automatically for files in the data directory. If you use unix socket
-        authentication, remember to give the new <literal>matomo</literal> user
-        access to the database and to change the <literal>username</literal> to
-        <literal>matomo</literal> in the <literal>[database]</literal> section
-        of <filename>/var/lib/matomo/config/config.ini.php</filename>.
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        If you named your database `piwik`, you might want to rename it to
-        `matomo` to keep things clean, but this is neither enforced nor
-        required.
-       </para>
-      </listitem>
-     </itemizedlist>
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>nodejs-4_x</literal> is end-of-life.
-     <literal>nodejs-4_x</literal>, <literal>nodejs-slim-4_x</literal> and
-     <literal>nodePackages_4_x</literal> are removed.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The <literal>pump.io</literal> NixOS module was removed. It is now
-     maintained as an
-     <link xlink:href="https://github.com/rvl/pump.io-nixos">external
-     module</link>.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The Prosody XMPP server has received a major update. The following modules
-     were renamed:
-     <itemizedlist>
-      <listitem>
-       <para>
-        <option>services.prosody.modules.httpserver</option> is now
-        <option>services.prosody.modules.http_files</option>
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        <option>services.prosody.modules.console</option> is now
-        <option>services.prosody.modules.admin_telnet</option>
-       </para>
-      </listitem>
-     </itemizedlist>
-    </para>
-    <para>
-     Many new modules are now core modules, most notably
-     <option>services.prosody.modules.carbons</option> and
-     <option>services.prosody.modules.mam</option>.
-    </para>
-    <para>
-     The better-performing <literal>libevent</literal> backend is now enabled
-     by default.
-    </para>
-    <para>
-     <literal>withCommunityModules</literal> now passes through the modules to
-     <option>services.prosody.extraModules</option>. Use
-     <literal>withOnlyInstalledCommunityModules</literal> for modules that
-     should not be enabled directly, e.g <literal>lib_ldap</literal>.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     All prometheus exporter modules are now defined as submodules. The
-     exporters are configured using
-     <literal>services.prometheus.exporters</literal>.
-    </para>
-   </listitem>
-  </itemizedlist>
- </section>
-
- <section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         version="5.0"
-         xml:id="sec-release-18.03-notable-changes">
-  <title>Other Notable Changes</title>
-
-  <itemizedlist>
-   <listitem>
-    <para>
-     ZNC option <option>services.znc.mutable</option> now defaults to
-     <literal>true</literal>. That means that old configuration is not
-     overwritten by default when update to the znc options are made.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The option <option>networking.wireless.networks.&lt;name&gt;.auth</option>
-     has been added for wireless networks with WPA-Enterprise authentication.
-     There is also a new <option>extraConfig</option> option to directly
-     configure <literal>wpa_supplicant</literal> and <option>hidden</option> to
-     connect to hidden networks.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     In the module <option>networking.interfaces.&lt;name&gt;</option> the
-     following options have been removed:
-     <itemizedlist>
-      <listitem>
-       <para>
-        <option>ipAddress</option>
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        <option>ipv6Address</option>
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        <option>prefixLength</option>
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        <option>ipv6PrefixLength</option>
-       </para>
-      </listitem>
-      <listitem>
-       <para>
-        <option>subnetMask</option>
-       </para>
-      </listitem>
-     </itemizedlist>
-     To assign static addresses to an interface the options
-     <option>ipv4.addresses</option> and <option>ipv6.addresses</option> should
-     be used instead. The options <option>ip4</option> and <option>ip6</option>
-     have been renamed to <option>ipv4.addresses</option>
-     <option>ipv6.addresses</option> respectively. The new options
-     <option>ipv4.routes</option> and <option>ipv6.routes</option> have been
-     added to set up static routing.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The option <option>services.logstash.listenAddress</option> is now
-     <literal>127.0.0.1</literal> by default. Previously the default behaviour
-     was to listen on all interfaces.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>services.btrfs.autoScrub</literal> has been added, to
-     periodically check btrfs filesystems for data corruption. If there's a
-     correct copy available, it will automatically repair corrupted blocks.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>displayManager.lightdm.greeters.gtk.clock-format.</literal> has
-     been added, the clock format string (as expected by strftime, e.g.
-     <literal>%H:%M</literal>) to use with the lightdm gtk greeter panel.
-    </para>
-    <para>
-     If set to null the default clock format is used.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     <literal>displayManager.lightdm.greeters.gtk.indicators</literal> has been
-     added, a list of allowed indicator modules to use with the lightdm gtk
-     greeter panel.
-    </para>
-    <para>
-     Built-in indicators include <literal>~a11y</literal>,
-     <literal>~language</literal>, <literal>~session</literal>,
-     <literal>~power</literal>, <literal>~clock</literal>,
-     <literal>~host</literal>, <literal>~spacer</literal>. Unity indicators can
-     be represented by short name (e.g. <literal>sound</literal>,
-     <literal>power</literal>), service file name, or absolute path.
-    </para>
-    <para>
-     If set to <literal>null</literal> the default indicators are used.
-    </para>
-    <para>
-     In order to have the previous default configuration add
-<programlisting>
-  services.xserver.displayManager.lightdm.greeters.gtk.indicators = [
-    "~host" "~spacer"
-    "~clock" "~spacer"
-    "~session"
-    "~language"
-    "~a11y"
-    "~power"
-  ];
-</programlisting>
-     to your <literal>configuration.nix</literal>.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     The NixOS test driver supports user services declared by
-     <literal>systemd.user.services</literal>. The methods
-     <literal>waitForUnit</literal>, <literal>getUnitInfo</literal>,
-     <literal>startJob</literal> and <literal>stopJob</literal> provide an
-     optional <literal>$user</literal> argument for that purpose.
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     Enabling bash completion on NixOS,
-     <literal>programs.bash.enableCompletion</literal>, will now also enable
-     completion for the Nix command line tools by installing the
-     <link xlink:href="https://github.com/hedning/nix-bash-completions">nix-bash-completions</link>
-     package.
-    </para>
-   </listitem>
-  </itemizedlist>
- </section>
-</section>