guix describe: Adjust test to latest changes.

This is a followup to 64a070717c3de32332201df5d6d2d52a7f99dce9.

* tests/guix-describe.sh: Add trailing slash when checking URL.

store: Open daemon connections with SOCK_CLOEXEC.

Previously, 'guix shell' for example would leak the socket that's
connected to the daemon.

* guix/store.scm (open-unix-domain-socket, open-inet-socket): Pass
SOCK_CLOEXEC to 'socket'.
* tests/guix-shell.sh: Add test.

store: Remove unused variable and 'socket' call.

* guix/store.scm (open-inet-socket): Remove unused 'sock' variable.

services: upower: Default to a percentage-based policy.

This is the documented default of UPower 0.99.15 (the actual default
appears to be #f though).

* gnu/services/desktop.scm (<upower-configuration>)
[use-percentage-for-policy?]: Default to #t.
* doc/guix.texi (Desktop Services): Adjust accordingly.  Explain the
tradeoff.

services: upower: Update default percentage values.

These values are those used by default by UPower 0.99.15.

* gnu/services/desktop.scm (<upower-configuration>)[percentage-low]
[percentage-critical]: Increase.
* doc/guix.texi (Desktop Services): Update accordingly.

gnu: scintilla: Update to 5.3.0.

* gnu/packages/text-editors.scm (scintilla): Update to 5.3.0.

gnu: emacs-autothemer: Update to 0.2.12.

* gnu/packages/emacs-xyz.scm (emacs-autothemer): Update to 0.2.12.
[description]: Add missing final full stop.

gnu: f3d: Update to 1.3.0-pre-0.46df21f.

* gnu/packages/graphics.scm (f3d): Update to 1.3.0-pre-0.46df21f.
[source](modules, snippet): New fields.
[arguments]<#:configure-flags>: Generate manual page, install various
resource files, and enable the now-optional external rendering feature.
[native-inputs]: New field.
[synopsis]: Add hyphen.
[description]: Reword.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu: erlang: Update to 25.0.4.

* gnu/packages/erlang.scm (erlang): Update to 25.0.4.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu: elixir: Update to 1.14.0.

* gnu/packages/elixir.scm (elixir): Update to 1.14.0.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu: foot: Update to 1.13.1.

* gnu/packages/terminals.scm (foot): Update to 1.13.1.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu: xmobar: Update to 0.44.2.

* gnu/packages/wm.scm (xmobar): Update to 0.44.2.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu: Add cl-portable-condition-system.

* gnu/packages/lisp-xyz.scm (cl-portable-condition-system): New variable.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu: shotwell: Update to 0.30.16.

* gnu/packages/gnome.scm (shotwell): Update to 0.30.16.

gnu: Remove duplicate package.

* gnu/packages/emacs-xyz.scm (emacs-inheritenv): Remove duplicate package
introduced in 21f6026574b0e93f52176b9d20f9a6188f8a5066.

gnu: ding: Update to 1.9.

* gnu/packages/dictionaries.scm (ding): Update to 1.9.
[source]: Switch to HTTPS.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

gnu: xfce4-notifyd: Update to 0.6.4.

* gnu/packages/xfce.scm (xfce4-notifyd): Update to 0.6.4.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

gnu: lesspipe: Update to 2.06.

* gnu/packages/less.scm (lesspipe): Update to 2.06.
[arguments]: Fixed typos in comment.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

Fix misspelling of GUIX_DIGITAL_OCEAN_TOKEN.

* gnu/machine/digital-ocean.scm (maybe-raise-missing-api-key-error): Fix
  misspelling of GUIX_DIGITAL_OCEAN_TOKEN.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

gnu: Add emacs-engrave-faces.

* gnu/packages/emacs-xyz.scm (emacs-engrave-faces): New variable.