gnu: Fetch several Git sources over HTTPS.

* gnu/packages/admin.scm (interrobang)[source]: Use HTTPS URL.
* gnu/packages/audio.scm (ardour)[source]: Likewise.
* gnu/packages/embedded.scm (libjaylink, openocd)[source]: Likewise.
* gnu/packages/gnome.scm (byzanz)[source]: Likewise.
* gnu/packages/gnunet.scm (guile-gnunet)[source]Likewise.
* gnu/packages/java.scm (classpath)[source]: Likewise.
* gnu/packages/microcom.scm (microcom)[source]: Likewise.
* gnu/packages/python.scm (python-axolotl-curve25519)[source]: Likewise.
* gnu/packages/rdesktop.scm (freerdp)[source]: Likewise.
* gnu/packages/shells.scm (rc)[source]: Likewise.
* gnu/packages/web.scm (libwebsockets)[source]: Use new source URL.

gnu: youtube-dl: Update to 2017.08.27.1.

* gnu/packages/video.scm (youtube-dl): Update to 2017.08.27.1.

gnu: iodine: Fix path to ifconfig.

* gnu/packages/networking.scm (iodine)[arguments]: Fix path to ifconfig.

gnu: filezilla: Update to 3.27.1.

* gnu/packages/ftp.scm (filezilla): Update to 3.27.1.

gnu: libfilezilla: Update to 0.10.1.

* gnu/packages/ftp.scm (libfilezilla): Update to 0.10.1.
[native-inputs]: Add pkg-config.

gnu: wxwidgets: Update to 3.0.3.

* gnu/packages/wxwidgets.scm (wxwidgets): Update to 3.0.3.
[source]: Remove 'wxwidgets-fix-windowGTK.patch'.
* gnu/packages/patches/wxwidgets-fix-windowGTK.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu: gnome: Install some GStreamer plugins.

* gnu/packages/gnome.scm (gnome): Add gst-plugins-base and gst-plugins-good.
This will allow stock GNOME installs to play Ogg Vorbis files, among other
things.  It will also ensure that GST_PLUGIN_SYSTEM_PATH is set to a sensible
value when GNOME is installed to the system instead of the user profile.

gnu: totem: Wrap environment for thumbnailer.

* gnu/packages/gnome.scm (totem): Wrap thumbnailer also in environment that
  sets GST_PLUGIN_SYSTEM_PATH.

gnu: nano: Update to 2.8.7.

* gnu/packages/nano.scm (nano): Update to 2.8.7.

gnu: perl: Work around more "dotless @INC" build failures.

* gnu/packages/perl.scm (perl-unicode-collate)[arguments]: Add
'set-perl-search-path' phase.
* gnu/packages/xorg.scm (perl-x11-xcb)[arguments]: Likewise.

gnu: perl-www-opensearch: Provide Module::Install.

* gnu/packages/web.scm (perl-www-opensearch)[native-inputs]: Add PERL-MODULE-INSTALL.

gnu: perl-xml-atom: Update to 0.42.

* gnu/packages/xml.scm (perl-xml-atom): Update to 0.42.
[arguments]: Add 'set-perl-search-path' phase.
[native-inputs]: Add PERL-HTML-TAGSET and PERL-MODULE-BUILD-TINY.

gnu: babl: Update to 0.1.30.

* gnu/packages/gimp.scm (babl): Update to 0.1.30.

gnu: Remove unneeded import.

* gnu/packages/engineering.scm: Don't import (srfi srfi-1) in top scope.

gnu: tdb: Update to 1.3.15.

* gnu/packages/databases.scm (tdb): Update to 1.3.15.

gnu: enlightenment: Update to 0.21.9.

* gnu/packages/enlightenment.scm (enlightenment): Update to 0.21.9.

gnu: xauth: Enable tests.

* gnu/packages/xorg.scm (xauth)[arguments]: Enable tests.
[native-inputs]: Add cmdtest.

gnu: Add cmdtest.

* gnu/packages/check.scm (cmdtest): New variable.

Co-authored-by: Arun Isaac <arunisaac@systemreboot.net>

Merge branch 'core-updates'

gnu: gnome: Depend on xdg-user-dirs.

* gnu/packages/gnome.scm (gnome): Add xdg-user-dirs dependency.  The presence
  of the autostart file in /run/current-system/profile/etc/xdg should cause
  xdg-user-dirs to be run when a user logs in, ensuring that they have
  ~/Pictures and other well-known user directories.