gnu: python-psycopg2: Use postgresql@9.6.

* gnu/packages/python.scm (python-psycopg2)[inputs]: Replace postgresql
with postgresql@9.6.

gnu: Add postgresql@9.6.

* gnu/packages/databases.scm (postgresql@9.6): New variable.

gnu: Add python-jupyter-console as input to python-ipython.

This fixes running ipython console and ipython3 console, as the
jupyter_console package is missing.

As python-ipython is an input to python-jupyter-console, use a modified
version of the package which doesn't have this input.

* gnu/packages/python.scm (python-jupyter-console-minimal): New variable.
  (python-ipython)[propagated-inputs]: Replace python-jupyter-console with
  python-jupyter-console-minimal.

gnu: wireshark: Minor package improvements.

* gnu/packages/networking.scm (wireshark)[inputs]: Move QTTOOLS ...
[native-inputs]: ... here.
[home-page]: Remove duplicate.

gnu: wireshark: Update to 2.4.2.

* gnu/packages/networking.scm (wireshark): Update to 2.4.2.

gnu: xorg-server: Update to 1.19.5. [security fixes]

Fixes CVE-2017-{12176..12187}.  See
<https://lists.x.org/archives/xorg-announce/2017-October/002814.html>

* gnu/packages/xorg.scm (xorg-server): Update to 1.19.5.

Revert "gnu: xorg-server: Make the test-variant visible."

Hiding/unhiding changes the derivation and thus this caused too many rebuilds
for 'master'.

This reverts commit 8cf892e6cd488fe9c1dee8e90c5474315378cbeb.

gnu: libextractor: Update to 1.5.

* gnu/packages/gnunet.scm (libextractor): Update to 1.5.

gnu: ccid: Update to 1.4.28.

* gnu/packages/security-token.scm (ccid): Update to 1.4.28.

gnu: mesa: Disable imx driver for armhf-linux.

* gnu/packages/gl.scm (mesa)<#:configure-flags>: Don't build imx driver.

gnu: qt: Update to 5.9.2.

* gnu/packages/qt.scm (qt): Update to 5.9.2.
[outputs]: Add 'examples'.
[source]: Update 3rd party code to unbundle.
[inputs]: Add bluez, double-conversion, gstreamer, gst-plugins-base,
jasper, libinput-minimal, libtiff, libwebp, libxext, wayland. Replace
pcre with pcre2.
[arguments]: Re-enable parallel building. Update build flags.

services: cleanup: Remove Shadow lock files from /etc.

Partly fixes <https://bugs.gnu.org/28772>.
Reported by Oleg Pykhalov <go.wigust@gmail.com>.

* gnu/services.scm (cleanup-gexp): Remove /etc/{passwd,group}.lock and
/etc/.pwd.lock.

gnu: f-seq: Truncate version string.

* gnu/packages/bioinformatics.scm (f-seq)[version]: Truncate commit part of
the version string.

gnu: totem: Update to 3.26.0.

* gnu/packages/gnome.scm (totem): Update to 3.26.0.
[source]: Add 'patches' field.
[build-system]: Switch to MESON-BUILD-SYSTEM.
[native-inputs]: Add GTK+:bin and GLIB:bin.
[arguments]: Pass #:glib-or-gtk?.  Adjust #:configure-flags to new
syntax.
* gnu/packages/patches/totem-meson-easy-codec.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

services: gnome: Register more polkit actions.

This should allow more operations such as changing the system date and
time via the Control Center (reported at
<https://lists.gnu.org/archive/html/help-guix/2016-09/msg00059.html>),
performing "file operations" via gvfs, and interacting with processes
using the System Monitor.

* gnu/services/desktop.scm (gnome-polkit-settings): New procedure.
(gnome-desktop-service-type): Use it in POLKIT-SERVICE-TYPE extension.

gnu: mobile-broadband-provider-info: Update to 20170310.

* gnu/packages/gnome.scm (mobile-broadband-provider-info): Update to 20170310.

gnu: dovecot: Update to 2.2.33.1.

* gnu/packages/mail.scm (dovecot): Update to 2.2.33.1.

gnu: gparted: Update to 0.30.0.

* gnu/packages/disk.scm (gparted): Update to 0.30.0.

gnu: evince: Update to 3.26.0.

* gnu/packages/gnome.scm (evince): Update to 3.26.0.

gnu: orca: Update to 3.26.0.

gnu/packages/gnome.scm (orca): Update to 3.26.0.