* gnu/services/xorg.scm (slim-service): Document session types and
  ~/.xsession.
* doc/guix.texi (X Window): Adjust accordingly.

* gnu/services/desktop.scm (%desktop-services): New variable.
* doc/guix.texi (Desktop Services): Document it.

Reported by 宋文武 <iyzsong@gmail.com>.

* guix/build/profiles.scm (build-etc/profile,
  ensure-writable-directory): New procedures.
  (build-profile): Use them.
* tests/profiles.scm ("etc/profile when etc/ already exists"): New test.

* gnu/system/nss.scm (%mdns-host-lookup-nss): New variable.
* doc/guix.texi (Name Service Switch): Document it.

* gnu/packages/gnome.scm (aisleriot): New variable.

* gnu/packages/gcc.scm (gcj)[arguments]: Add build phase to add library output
  directory to RUNPATH.

* gnu/packages/patches/linux-libre-libreboot-fix.patch: Remove file.
* gnu-system.am (dist_patch_DATA): Remove it.
* gnu/packages/linux.scm (linux-libre): Update to 4.0.2.  Remove patch.

* gnu/packages/libreoffice.scm (libwps): New variable.

* gnu/packages/libreoffice.scm (libmwaw): New variable.

* gnu/packages/libreoffice.scm (libodfgen): New variable.

* gnu/artwork.scm (%artwork-repository): Update.
* gnu/services/xorg.scm (%default-slim-theme-name): Change to "0.x".
* gnu/system/grub.scm (%background-image): Change to
  GuixSD-fully-black-4-3.svg.

* gnu/packages/audio.scm (ardour): Inherit from "ardour-3" instead of
  "ardour".

* gnu/packages/audio.scm (ardour): Rename to ...
  (ardour-3): ... this.
  (ardour): New variable.

* gnu/packages/gnucash.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

* gnu/packages/webkit.scm (webkitgtk-2.4): New variable.
* gnu/packages/patches/webkitgtk-2.4.8-gmutexlocker.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.

* gnu/packages/gnome.scm (goffice-0.8): New variable.

* gnu/packages/gl.scm (mesa): Pass "nouveau" to "--with-gallium-drivers" flag.

* gnu/packages/patches/serf-comment-style-fix.patch,
  gnu/packages/patches/serf-deflate-buckets-test-fix.patch: New file.
* gnu-system.am (dist_patch_DATA): Add them.
* gnu/packages/web.scm (serf): Add patches.  Remove 'remove-non-c89-comment'
  phase.

* gnu/packages/vpn.scm (openvpn): New variable.

* gnu/packages/linux.scm (bridge-utils): Patch source to fix compilation
  error.  Patch Makefile to fail in case of future compilation errors.

* gnu/services/databases.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi ("Database Services"): New subsubsection.

* gnu/packages/version-control.scm (neon-0.29.6): Remove variable.

This is a followup to d5e9f380, which upgraded
subversion to 1.8.x.  Previously we used 'neon' to support http access
methods, but subversion 1.8 drops support for 'neon' in favor of 'serf'.

* gnu/packages/version-control.scm (subversion)[inputs]: Add 'serf' and remove
  'neon'.
  [arguments]: Fix typo in phase name.

* gnu/packages/web.scm (serf): New variable.

* gnu/packages/python.scm (scons): Update to 2.3.4.

* gnu/packages/apr.scm: Import (guix licenses) with prefix "l:".
  (apr)[license]: Adapt to license prefix.
  (apr-util)[propagated-inputs]: Add expat.
  [arguments]: Pass --with-expat to configure.
  [license]: Adapt to license prefix.

* gnu/packages/apr.scm (apr): Update to 1.5.2.

* gnu/system.scm (etc-directory)[profile]: Use "." instead of "source",
  the latter being Bash-specific.

* gnu/system.scm (etc-directory)[profile]: Check for
  ~/.guix-profile/etc/profile rather than just ~/.guix-profile.

* gnu/packages/disk.scm (dosfstools): New variable.

* tests/profiles.scm ("etc/profile"): Unset GUIX_PROFILE before sourcing
  etc/profile.  Use '.' instead of 'source' for sourcing.  Call 'echo $PATH'
  instead of using the output of 'set' to determine whether PATH is set.

* gnu/packages/libreoffice.scm (libvisio): New variable.

* gnu/packages/libreoffice.scm (libpagemaker): New variable.

* gnu/packages/libreoffice.scm (libmspub): New variable.

* gnu/packages/libreoffice.scm (libfreehand): New variable.

* gnu/packages/libreoffice.scm (libexttextcat): New variable.

* gnu/packages/libreoffice.scm (libetonyek): New variable.

* gnu/packages/libreoffice.scm (libcdr): New variable.

* gnu/packages/libreoffice.scm (libabw): New variable.

* gnu/packages/freedesktop.scm (python-pyxdg, python2-pyxdg): New variables.