* gnu/packages/gnome.scm (libnotify)[arguments]: New field.

libnotify doesn't propagate other needed libraries for linking against
it resulting in pkg-config errors like

> Package gdk-pixbuf-2.0 was not found in the pkg-config search path.
> Perhaps you should add the directory containing `gdk-pixbuf-2.0.pc'
> to the PKG_CONFIG_PATH environment variable

* gnu/packages/gnome.scm (libnotify)[inputs]: Move GLIB and GDK-PIXBUF ...
[propagated-inputs]: ... here.  New field.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

This fixes CVE-2019-8595, CVE-2019-8607, and CVE-2019-8615.

* gnu/packages/patches/webkitgtk-sse2.patch: Delete file.
* gnu/packages/patches/webkitgtk-sans-gstreamer-gl.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/webkit.scm (webkitgtk-2.24): Update to 2.24.2.
[source](patches): Add the new patch; remove 'webkitgtk-sse2.patch'.

* gnu/packages/gnome.scm (libsoup): Update to 2.66.2.

* gnu/packages/chromium.scm (%chromium-version): Update to 74.0.3729.157.
(%ungoogled-revision): Update to d2beaef.
(ungoogled-chromium-source): Update hashes.

* gnu/packages/mes.scm (mes)[native-inputs]: Change i686-linux-binutils and
i686-linux-gcc conditional inclusion.

* gnu/packages/c.scm (libfixposix): New variable.

* gnu/packages/emacs-xyz.scm (emacs-desktop-environment): Update to 0.2.1.

* gnu/packages/web-browsers.scm (next-gtk-webkit): Update to 1.2.2.

* gnu/packages/databases.scm (memcached): Update to 1.5.14.

* gnu/packages/dc.scm (ncdc): Update to 1.22.

* gnu/packages/linux.scm (btrfs-progs): Update to 5.1.

* gnu/packages/xml.scm (perl-xml-compile): Update to 1.62.

* gnu/packages/games.scm (drascula): New variable.

* gnu/packages/gtk.scm (libdbusmenu)[license]: Remove GPL3.  Add comment
about dual-licensing.

* gnu/packages/gtk.scm (libdbusmenu): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/zwave.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

* doc/contributing.texi (Building from Git): Add --pure to "guix environment"
  invocations

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* guix/self.scm (info-manual)[po4a, gettext]: Remove.

* gnu/packages/game-development.scm (openmw)[inputs]: Replace mygui with
mygui-gl.

* gnu/packages/game-development.scm (mygui-gl): New variable.

* gnu/packages/game-development.scm (mygui)[source]: Use GIT-FETCH and
GIT-FILE-NAME.
[arguments]: Disable Windows-specific demos and tools.

* gnu/packages/statistics.scm (r-glmnet): Update to 2.0-18.

* gnu/packages/statistics.scm (r-knitr): Update to 1.23.

* gnu/packages/statistics.scm (r-digest): Update to 0.6.19.

* gnu/packages/cran.scm (r-ggcorrplot): Update to 0.1.3.

* gnu/packages/cran.scm (r-gridgraphics): Update to 0.4-1.

* gnu/packages/bioinformatics.scm (r-limma): Update to 3.40.2.

* gnu/packages/bioinformatics.scm (r-edger): Update to 3.26.3.

* gnu/packages/bioconductor.scm (r-quasr): Update to 1.24.2.

* gnu/packages/bioconductor.scm (r-rhisat2): Update to 1.0.1.

* gnu/packages/bioconductor.scm (r-regioner): Update to 1.16.2.

* gnu/packages/bioinformatics.scm (r-scater): Update to 1.12.1.

* gnu/packages/bioinformatics.scm (r-seurat): Update to 3.0.1.

* gnu/packages/bioinformatics.scm (r-maldiquant): Update to 1.19.3.

* gnu/packages/bioinformatics.scm (r-edger): Update to 3.26.1.

* gnu/packages/cran.scm (r-dalex): Update to 0.4.

* gnu/packages/cran.scm (r-dqrng): Update to 0.2.1.

* gnu/packages/cran.scm (r-repr): Update to 1.0.1.

* gnu/packages/cran.scm (r-gamlss-dist): Update to 5.1-4.