gnu: Add youtube-dl-gui.

* gnu/packages/video.scm (youtube-dl-gui): New variable.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: icecat: Use system ICU.

* gnu/packages/gnuzilla.scm (icecat)[arguments] <#:configure-flags>: Remove
comment for "--with-system-icu".

gnu: icu4c: Fix crashes in programs using system ICU.

Fixes <http://bugs.gnu.org/26462>.

* gnu/packages/patches/icu4c-reset-keyword-list-iterator.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/icu4c.scm (icu4c)[replacement]: New field.
(icu4c/fixed): New variable.

gnu: go: Update to 1.8.1.

* gnu/packages/golang.scm (go-1.7): Replace with ...
(go-1.8): New variable.
[arguments]: Update substitutions in 'prebuild' phase.
(go): Update to go-1.8.

gnu: iptables: Update to 1.6.1.

* gnu/packages/linux.scm (iptables): Update to 1.6.1.
[source], [home-page]: Use HTTPS URLs.
[inputs]: Add libmnl and libnftnl.
[native-inputs]: Add bison, flex, and pkg-config.

gnu: Add libnftnl.

* gnu/packages/linux.scm (libnftnl): New variable.

gnu: Add libmnl.

* gnu/packages/linux.scm (libmnl): New variable.

gnu: v4l-utils: Update to 1.12.3.

* gnu/packages/video.scm (v4l-utils): Update to 1.12.3.
[native-inputs]: Add perl.

gnu: video: Always use HTTPS on videolan.org.

* gnu/packages/video.scm (libdca, libdvdread, libdvdnav, libdvdnav-4)
(libdvdcss)[source]: Use HTTPS.
(libdca, libdvdcss, libbdplus, libaacs)[home-page]: Likewise.

gnu: freedink-data: Update to 1.08.20170401.

* gnu/packages/games.scm (freedink-data): Update to 1.08.20170401.

scripts: system: Rename --no-grub option to --no-bootloader.

* guix/scripts/system.scm (%options, show-help): Adjust accordingly.
Keep "--no-grub" for compatibility reasons, but do not mention it in the help.

Signed-off-by: Danny Milosavljevic <dannym@scratchpost.org>

gnu: node: Actually set timeout to 1 h.

* gnu/packages/node.scm (node)[properties]: Actually set timeout to 1 h.

retroarch: Update to 1.5.0.

* gnu/packages/games.scm (retroarch): Update to 1.5.0.

gnu: node: Update to 7.8.0.

* gnu/packages/node.scm (node): Update to 7.8.0.
[properties]: Add timeout of 1 h.

gnu: yadifa: Update to 2.2.4.

* gnu/packages/dns.scm (yadifa): Update to 2.2.4.

gnu: perl-sys-cpu: Re-write description.

* gnu/packages/perl.scm (perl-sys-cpu)[description]: Fix some typos by
re-writing most of the description.

gnu: Fix typos in descriptions.

* gnu/packages/admin.scm (di)[description]: Likewise.
* gnu/packages/bioinformatics.scm (r-annotate)[description]: Likewise.
* gnu/packages/datastructures.scm (sparsehash)[description]: Likewise.
* gnu/packages/dns.scm (knot)[description]: Likewise.
* gnu/packages/emacs.scm (emacs-idle-highlight)[synopsis, description]:
Likewise.
* gnu/packages/gnome.scm (libpeas)[description]: Likewise.
* gnu/packages/gtk.scm (python2-pygtk)[description]: Likewise.
* gnu/packages/kde-frameworks.scm (kactivities)[description]: Fix typo.
* gnu/packages/libevent.scm (perl-anyevent)[description]: Likewise.
* gnu/packages/machine-learning.scm (ghmm)[description]: Likewise.
* gnu/packages/mail.scm (mlmmj)[description]: Likewise.
* gnu/packages/maths.scm (vc)[description]: Likewise.
* gnu/packages/music.scm (gx-super-fuzz-lv2)[description]: Likewise.
* gnu/packages/networking.scm (nload)[description]: Likewise.
* gnu/packages/python.scm (python-execnet)[description]: Likewise.
* gnu/packages/terminals.scm (tilda)[description]: Likewise.
* gnu/packages/python.scm (python-execnet, python-tables)
(python2-coverage-test-runner, python2-rope)[description]: Likewise.

gnu: fio: Update to 2.19.

* gnu/packages/benchmark.scm (fio): Update to 2.19.

gnu: nss: Increase test timeouts.

* gnu/packages/patches/nss-increase-test-timeout.patch: Wait up to 60s before
regarding a test as failed.

gnu: diffoscope: Update to 81.

* gnu/packages/package-management.scm (diffoscope): Update to 81.