* guix/http-client.scm (read-response-body*): Remove.
  (http-fetch): Remove hacks for 2.0.5.

* guix/scripts/authenticate.scm (%default-port-conversion-strategy):
  Remove.
* guix/scripts/substitute.scm (fetch): Remove 2.0.5 special cases.
* guix/serialization.scm (write-file): Remove 'scandir' workaround.
* guix/ui.scm (command-files): Likewise.

* configure.ac: Require guile-2.0 >= 2.0.7.
* README: Adjust accordingly.
* doc/guix.texi (Requirements): Likewise.

* gnu/packages/patches/guix-test-networking.patch: Delete it.
* gnu/packages/patches/libtool-skip-tests.patch: Delete it.
* gnu/packages/patches/python-sqlite-3.8.4-test-fix.patch: Delete it.
* gnu/packages/patches/udev-gir-libtool.patch: Delete it.
* gnu-system.am (dist_patch_DATA): Remove them as well.

* doc/guix.texi (System Installation): Add xref to "Using the
  Configuration System" instead of including one here.
  (Using the Configuration System): Remove first example, and include
  os-config-bare-bones.texi instead.  Include os-config-desktop.texi as
  a second example.
* doc.am (OS_CONFIG_EXAMPLES_TEXI): New variable.
  (BUILT_SOURCES, EXTRA_DIST, MAINTAINERCLEANFILES): Use it.
  (doc/os-config.texi): Remove.
  (doc/os-config-%.texi): New target.

* gnu/system/install.scm (configuration-template-service): Remove
  'local-template' and 'template'.  Add 'search' and 'templates'.
  [activate]: Copy all of TEMPLATES to /etc/configuration.
* doc/guix.texi (System Installation): Adjust file name accordingly.

* gnu/system/examples/bare-bones.tmpl: Change 'packages' and
  'host-name'.  Remove D-Bus, Avahi, and SLiM services, and add lsh
  instead.
* gnu/system/examples/desktop.tmpl: New file.
* Makefile.am (EXAMPLES): Add it.

* gnu/services/networking.scm (dhcp-client-service)[start]: Remove
  PID-FILE first.  When 'call-with-input-file' throws ENOENT, try
  again.

* gnu/system/os-config.tmpl: Rename to...
* gnu/system/examples/bare-bones.tmpl: ... this.
* Makefile.am (EXAMPLES): Adjust accordingly.
* doc.am (doc/os-config.texi): Likewise.
* gnu/system/install.scm (configuration-template-service)[template]:
  Likewise.

* gnu/packages/patches/wicd-template-instantiation.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/wicd.scm (wicd)[source]: Use it.

* gnu/build/activation.scm (activate-ptrace-attach): Check for the existence
  of /proc/sys/kernel/yama/ptrace_scope before trying to write to it.

* gnu/packages/databases.scm (sqlite): Update to 3.8.9.

* gnu/packages/patches/subversion-sqlite-3.8.9-fix.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/version-control.scm (subversion): Add patch.

* gnu/packages/databases.scm (mariadb): Update to 10.0.18.

* gnu/packages/gimp.scm (gimp): Enable Python scripting support.

* gnu/services/avahi.scm (avahi-service): Add URL in docstring.
* doc/guix.texi (Networking Services): Document it.
  (Name Service Switch): Fix cross-reference.

* 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.