gnu: gnupg: Update to 2.2.1.

* gnu/packages/gnupg.scm (gnupg): Update to 2.2.1.

gnu: system: Fix computation of boot parameters for LUKS devices.

* gnu/system.scm (read-boot-parameters): Fix store-device computation for root
devices of type "device", like the LUKS partition described in the manual.
From a patch from https://debbugs.gnu.org/cgi/bugreport.cgi?bug=28445#23.

Signed-off-by: Andy Wingo <wingo@igalia.com>

gnu: xorg-server: Prefer intel driver only for older GPUs.

* gnu/packages/xorg.scm (xorg-server): Add patch to only prefer the intel
  driver for older Intel GPUs.

Signed-off-by: Andy Wingo <wingo@igalia.com>

gnu: services: Add modesetting driver to xorg configuration path.

* gnu/services/xorg.scm (xorg-configuration-file): Add drivers path from
  xorg-server.  This includes the modesetting driver.

Signed-off-by: Andy Wingo <wingo@igalia.com>

gnu: xf86-video-intel: Update to latest Git.

* gnu/packages/xorg.scm (xf86-video-intel): Update to latest Git.

Signed-off-by: Andy Wingo <wingo@igalia.com>

gnu: Add cheese.

* gnu/packages/gnome.scm (cheese): New public variable.

Signed-off-by: Andy Wingo <wingo@igalia.com>

gnu: Add gnome-video-effects.

* gnu/packages/gnome.scm (gnome-video-effects): New public variable.

Signed-off-by: Andy Wingo <wingo@igalia.com>

download: Don't report the progress too fast.

* guix/utils.scm (<progress-reporter>): New record type.
(call-with-progress-reporter): New procedure.
* guix/build/download.scm (dump-port*, rate-limited, progress-reporter/file):
New procedures.
(ftp-fetch, http-fetch): Use 'dump-port*'.
(progress-proc): Remove procedure.
* guix/scripts/substitute.scm (progress-report-port): Rewrite in terms of
<progress-reporter>.
(process-substitution): Adjust accordingly.

cve: Disable position recording while reading the CVE list.

* guix/cve.scm (fetch-vulnerabilities)[read*]: New procedure.
Use it in lieu of 'read'.

doc: Mention 'mkfs.fat' for the ESP.

Suggested by Hartmut Goebel <h.goebel@crazy-compilers.com>.

* doc/guix.texi (Preparing for Installation): Mention 'mkfs.fat'.

gnu: emacs-skewer-mode: Include html and js files.

* gnu/packages/emacs.scm (emacs-skewer-mode): Include html and js files.

Signed-off-by: Alex Kost <alezost@gmail.com>

gnu: efl: Update to 1.20.4.

* gnu/packages/enlightenment.scm (efl): Update to 1.20.4.

doc: Add a note about closing bug threads.

* doc/contributing.texi (Submitting Patches): Add a note about closing bug
threads by mailing to NNN-done@debbugs.gnu.org.

Suggested-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>

doc: Add "Sending a Patch Series" subsection.

Searching for `git send-email' took you to the end of `Submitting Patches'
section which said

   You may use your email client or the ‘git send-email’ command.

without further warning or remark.

* doc/contributing.texi (Sending a Patch Series): Move information about
debbugs bug 15361 to subsection.  Add git-send-email index entries.
(Submitting Patches): Reference it.

system: Create "/etc/hostname".

* gnu/system.scm (operating-system-etc-service): Add a plain-file with the
  operating-system-host-name.

gnu: cuirass: Update development snapshot.

* gnu/packages/ci.scm (cuirass): Update to commit 87ad259.

http-client: 'http-client/cached' uses 'If-Modified-Since'.

* guix/http-client.scm (http-fetch/cached)[update-cache]: Add
'cache-port' parameter.  Check its mtime and compute 'if-modified-since'
header accordingly.  Guard 'http-get-error?' and honor 304.
Adjust callers of 'update-cache'.
* guix/gnu-maintenance.scm (ftp.gnu.org-files): Set #:ttl to 15m.

utils: 'current-source-directory' gracefully deals with lack of location info.

* guix/utils.scm (current-source-directory): Adjust for when
'syntax-source' returns #f.

gnu: qutebrowser: Update to 0.11.0.

* gnu/packages/web-browsers.scm (qutebrowser): Update to 0.11.0.

gnu: gstreamer: Update to 1.12.3.

* gnu/packages/gstreamer.scm (gstreamer, gst-plugins-base, gst-plugins-good,
gst-plugins-bad, gst-plugins-ugly, gst-libav, python-gst): Update to 1.12.3.