maint: Create an ISO9660 installation image in the 'release' target.

* Makefile.am (GUIXSD_IMAGE_BASE): Adapt target file name.
(release): Use file-system-type iso9660.
* doc/guix.texi: Document installation from DVD.

gnu: python-netaddr: Update to 0.7.19.

* gnu/packages/python.scm (python-netaddr): Update to 0.7.19.

gnu: lz4: Update to 1.8.0.

* gnu/packages/compression.scm (lz4): Update to 1.8.0.  Fix typo in comment.
[source]: Remove patch.
* gnu/packages/patches/lz4-fix-test-failures.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu: lz4: Use recommended home page.

* gnu/packages/compression.scm (lz4)[home-page]: Use lz4.org.

gnu: Remove libgames-support.

It was simply the old name (and version) of libgnome-games-support.

* gnu/packages/gnome.scm (libgames-support): Remove variable.  Move the
inherited fields...
(libgnome-games-support): ...to here.

gnu: newsbeuter: Fix CVE-2017-12904.

* gnu/packages/patches/newsbeuter-CVE-2017-12904.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/syndication.scm (newsbeuter)[source]: Use it.

gnu: python-pygit2: Update to 0.26.0.

* gnu/packages/python.scm (python-pygit2): Update to 0.26.0.
* gnu/packages/patches/python-pygit2-disable-network-tests.patch: Skip one
more test. Use unittest.skipIf instead of deleting sections.

gnu: gnome-shell: Update to 3.24.3.

* gnu/packages/gnome.scm (gnome-shell): Update to 3.24.3.

gnu: gnome-control-center: Update to 3.24.3.

* gnu/packages/gnome.scm (gnome-control-center): Update to 3.24.3.

gnu: gnome-keyring: Update to 3.20.1.

* gnu/packages/gnome.scm (gnome-keyring): Update to 3.20.1.

gnu: libgnome-games-support: Update to 1.2.2.

* gnu/packages/gnome.scm (libgnome-games-support): Update to 1.2.2.

gnu: gjs: Update to 1.48.6.

* gnu/packages/gnome.scm (gjs): Update to 1.48.6.

gnu: shotwell: Update to 0.26.3.

* gnu/packages/gnome.scm (shotwell): Update to 0.26.3.

gnu: totem-pl-parser: Update to 3.10.8.

* gnu/packages/gnome.scm (totem-pl-parser): Update to 3.10.8.

gnu: perl-crypt-openssl-bignum: Update to 0.08.

* gnu/packages/tls.scm (perl-crypt-openssl-bignum): Update to 0.08.

gnu: freerdp: Update inputs.

* gnu/packages/rdesktop.scm (freerdp) [native-inputs]: Add libxslt, libxml2
  and docbook-xsl.
  [inputs]: Add libjpeg, remove gstreamer, gst-plugins-base, libxml2 and
  libxslt.
  [arguments]: Enable features JPEG and SSE2 (on x86_64), and set up
  docbook-xsl.

gnu: freerdp: Revert to version 1.1.

* gnu/packages/rdesktop.scm (freerdp) [version, source]: Revert to upstream
  branch 1.1.  [inputs]: Use ffmpeg-2.8.
* gnu/packages/gnome.scm (vinagre): Add patches required to build against
  freerdp branch 1.1.
* gnu/packages/patches/vinagre-revert-1.patch,
  gnu/packages/patches/vinagre-revert-2.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.

gnu: xf86-video-siliconmotion: Fix building on aarch64.

* gnu/packages/xorg.scm (xf86-video-siliconmotion)[source]: Add patch.
* gnu/packages/patches/xf86-video-siliconmotion-fix-ftbfs.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.

gnu: libksysguard: Update to 5.10.4.

* gnu/packages/kde.scm (libksysguard ): Update to 5.10.4.

gnu: kde-framework: Update to 5.37.0.

* gnu/packages/kde-frameworks.scm (extra-cmake-modules, attica,
bluez-qt, breeze-icons, kapidox, karchive, kcodecs, kconfig,
kcoreaddons, kdbusaddons, kdnssd, kguiaddons, kil8n, kidletime,
kitemmodules, kplotting, ksyntaxhighlighting, kwayland, kwidgetsaddons,
kwindowsystem, modemmanager-qt, networkmanager-qt, oxygen-icons, solid,
sonnet, threadweaver, kauth, kcompletion, kcrash, kimageformats,
kjobwidgets, knotifications, kpackage, kpty, kunitconversion, baloo,
kactivities, kactivities-stats, kbookmarks, kcmutils, kconfigwidgets,
kdeclarative, kded, kdesignerplugin, kdesu, kemoticons, kglobalaccel,
kiconthemes, kinit, kio, knewstuff, knotifyconfig, kparts, kpeople,
krunner, kservice, ktexteditor, ktextwidgets, kwallet, kxmlgui,
kxmlrpcclient, plasma-framework, kde-framworkintegration,
kdelibs4support, khtml, kjs, kjsembed, kmediaplayer, kross): Update to 5.37.0.
(bluez-qt)[arguments]: Disable tests.
(kcodecs, khtml)[native-inputs]: Add gperf.
(ksyntaxhighlighting)[properties]: New field, add upstream-name.
(kimageformats, baloo)[arguments]: Add phase to disable failing test.
(krunner)[inputs]: Add kwindowsystem.