gnu: petsc: Update to 3.7.6.

* gnu/packages/maths.scm (petsc): Update to 3.7.6.

gnu: epiphany: Update to 3.24.3.

* gnu/packages/gnome.scm (epiphany): Update to 3.24.3.

gnu: tracker: Update to 1.12.2.

* gnu/packages/gnome.scm (tracker): Update to 1.12.2.

gnu: gnome-online-accounts: Update to 3.24.2.

* gnu/packages/gnome.scm (gnome-online-accounts): Update to 3.24.2.

gnu: mutter: Update to 3.24.4.

* gnu/packages/gnome.scm (mutter): Update to 3.24.4.

gnu: gedit: Support gspell.

* gnu/packages/gnome.scm (gedit)[arguments]: Remove #:configure-flags.
[inputs]: Add gspell.

gnu: gedit: Update to 3.22.1.

* gnu/packages/gnome.scm (gedit): Update to 3.22.1.

gnu: gspell: Propagate enchant dependency.

* gnu/packages/gnome.scm (gspell)[inputs]: Move enchant from here...
[propagated-inputs]: ...to here.

gnu: gspell: Order inputs alphabetically.

* gnu/packages/gnome.scm (gspell)[inputs, native-inputs]: Re-order.

gnu: gnumeric: Update to 1.12.35.

* gnu/packages/gnome.scm (gnumeric): Update to 1.12.35.

gnu: brasero: Update to 3.12.2.

* gnu/packages/gnome.scm (brasero): Update to 3.12.2.

gnu: Use HTTPS for gnome.org and subdomains.

* gnu/packages/fonts.scm (font-bitstream-vera)[home-page]: Use HTTPS.
* gnu/packages/glib.scm (glib)[home-page]: Likewise.
* gnu/packages/gnome.scm (gcr, libgnome-keyring, gnome-keyring, evince)
(gnome-icon-theme, libgsf, gnome-mime-data, vala, vte, python2-rsvg)
(glib-networking, gnome-settings-daemon, libchamplain, grilo, grilo-plugins)
(gjs, zenity, mutter, network-manager, network-manager-applet, gdm)
[home-page]: Likewise.
* gnu/packages/gtk.scm (gtk-engines, murrine)[home-page]: Likewise.

gnu: 0ad: Update to 0.0.22-alpha.

* gnu/packages/games.scm (0ad-data, 0ad): Update to 0.0.22-alpha.

services: herd: Add a stop-service procedure.

* gnu/services/herd.scm (stop-service): New procedure.

services: herd: Fix matching ok responses from shepherd service.

Previously the match expression case for a successful response
(where error is #f) required that the result component contained a list with a
single element.

As far as I see when looking at the responses from the shepherd, this is not
normally the case. Therefore, to avoid treating successful responses as
errors, make the match requirement more permissive, accepting any value.

* gnu/services/herd.scm (invoke-action): Change match condition for ok responses.

gnu: babl: Update to 0.1.28.

* gnu/packages/gimp.scm (babl): Update to 0.1.28.

gnu: gegl: Use 'modify-phases' syntax.

* gnu/packages/gimp.scm (gegl)[arguments]: Use the 'modify-phases' syntax.

gnu: gegl: Fix building on aarch64.

* gnu/packages/gimp.scm (gegl)[arguments]: Add '-lm' configure-flag.

gnu: ruby-activesupport: Update to 5.1.3.

* gnu/packages/ruby.scm (ruby-activesupport): Update to 5.1.3.

gnu: pciutils: Update to 3.5.5.

* gnu/packages/pciutils.scm (pciutils): Update to 3.5.5.