gnu: drumkv1: Update to 0.8.3.

* gnu/packages/music.scm (drumkv1): Update to 0.8.3.

gnu: synthv1: Update to 0.8.3.

* gnu/packages/music.scm (synthv1): Update to 0.8.3.

doc: Encourage signature verification.

* doc/contributing.texi (Submitting Patches): Remind contributors to verify
cryptographic signatures.

gnu: Add f-seq.

* gnu/packages/bioinformatics.scm (f-seq): New variable.

gnu: virt-manager: Add gtk-vnc and vte to inputs.

* gnu/packages/qemu.scm (virt-manager)[inputs]: Add gtk-vnc and vte.

gnu: python-libvirt: Update to 3.4.0.

* gnu/packages/qemu.scm (python-libvirt, python2-libvirt): Update to 3.4.0.

gnu: libvirt: Update to 3.4.0, add more inputs.

* gnu/packages/qemu.scm (libvirt): Update to 3.4.0.
[inputs]: Add dmidecode, dnsmasq, ebtables, iproute and iptables.

gnu: Add ebtables.

* gnu/packages/linux.scm (ebtables): New package.

gnu: libvirt: Use /etc as the sysconfdir.

* gnu/packages/qemu.scm (libvirt)[arguments]: Add '--sysconfdir=/etc' to
configure flags.  Replace the 'do-not-mkdir-in-/var' phase with a modified
'install' phase.

gnu: Add emacs-which-key.

* gnu/packages/emacs.scm (emacs-which-key): New variable.

Signed-off-by: Arun Isaac <arunisaac@systemreboot.net>

gnu: nano: Update to 2.8.5.

* gnu/packages/nano.scm (nano): Update to 2.8.5.

gnu: git: Update to 2.13.2.

* gnu/packages/version-control.scm (git): Update to 2.13.2.

gnu: grub: Disable a flaky test.

* gnu/packages/bootloaders.scm (grub)[arguments]: Add 'disable-flaky-test' phase
and run the tests in parallel.

gnu: imagemagick: Update to 6.9.8-10.

* gnu/packages/imagemagick.scm (imagemagick): Update to 6.9.8-10.

gnu: weechat: Update to 1.9.

* gnu/packages/irc.scm (weechat): Update to 1.9.

gnu: perl-image-exiftool: Update to 10.55.

* gnu/packages/photo.scm (perl-image-exiftool): Update to 10.55.
[arguments]: Use modify-phases syntax.

gnu: Remove libwmf.

This package contains many security vulnerabilities and is no longer maintained
upstream. See this discussion for more information:

https://lists.gnu.org/archive/html/guix-devel/2017-05/msg00478.html

* gnu/packages/image.scm (libwmf): Remove variable.
* gnu/packages/wv.scm (wv)[inputs]: Remove libwmf.
[arguments]: Remove field.
* gnu/packages/abiword.scm (abiword)[inputs]: Remove libwmf.
[source]: Remove patch 'abiword-wmf-version-lookup-fix.patch'.
* gnu/packages/patches/abiword-wmf-version-lookup-fix.patch,
gnu/packages/patches/libwmf-CAN-2004-0941.patch,
gnu/packages/patches/libwmf-CVE-2006-3376.patch,
gnu/packages/patches/libwmf-CVE-2007-0455.patch,
gnu/packages/patches/libwmf-CVE-2007-2756.patch,
gnu/packages/patches/libwmf-CVE-2007-3472.patch,
gnu/packages/patches/libwmf-CVE-2007-3473.patch,
gnu/packages/patches/libwmf-CVE-2007-3477.patch,
gnu/packages/patches/libwmf-CVE-2009-1364.patch,
gnu/packages/patches/libwmf-CVE-2009-3546.patch,
gnu/packages/patches/libwmf-CVE-2015-0848+CVE-2015-4588.patch,
gnu/packages/patches/libwmf-CVE-2015-4695.patch,
gnu/packages/patches/libwmf-CVE-2015-4696.patch: Delete files.
* gnu/local.mk (dist_patch_DATA): Remove them.

gnu: retroarch: Update to 1.6.1.

* gnu/packages/games.scm (retroarch): Update to 1.6.1.
[home-page]: Use HTTPS.

gnu: Add armagetronad.

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

gnu: Add eog-plugins.

* gnu/packages/gnome.scm (eog-plugins): New variable.