gnu: lm-sensors: Use a descriptive file name for the source tarball.

* gnu/packages/linux.scm (lm-sensors)[source]: Add file-name field.

gnu: mcelog: Update to 149.

* gnu/packages/linux.scm (mcelog): Update to 149.

gnu: corkscrew: Install the README file.

* gnu/packages/ssh.scm (corkscrew)[arguments]: Add a very basic
‘install-documentation’ phase.

gnu: haunt: Disable test suite.

* gnu/packages/guile.scm (haunt): Disable test suite.

gnu: Add grafx2.

* gnu/packages/game-development.scm (grafx2): New variable.

gnu: geoclue: Update to 2.4.6.

* gnu/packages/gnome.scm (geoclue): Update to 2.4.6.

gnu: corkscrew: Improve descriptions.

* gnu/packages/ssh.scm (corkscrew)[synopsis, description]: Fix typos and
condense.  Remove scary warning (the tunnel is always encrypted through
SSH) and speculation.

gnu: corkscrew: Download source from a mirror.

* gnu/packages/ssh.scm (corkscrew)[source]: Use
‘https://downloads.openwrt.org’.

gnu: mosh: Update to 1.3.0.

* gnu/packages/ssh.scm (mosh): Update to 1.3.0.

gnu: youtube-dl: Update to 2017.03.26.

* gnu/packages/video.scm (youtube-dl): Update to 2017.03.26.

gnu: gnuplot: Enable tikz backend.

* gnu/packages/maths.scm (gnuplot)[inputs]: Add lua.

ui: Support Texinfo markup in package synopses.

* guix/ui.scm (package-field-string): New procedure.
(package-description-string): Use it.
(package-synopsis-string): New procedure.
(package->recutils): Use it.
* guix/scripts/lint.scm (check-synopsis-style)[check-texinfo-markup]:
New procedure.  Use it in checks.
* tests/lint.scm: Test it.
* gnu/packages/perl.scm (perl-try-tiny)[synopsis]: Adjust for the
Texinfo markup.

maint: Give command to install the pre-push hook.

* HACKING: Add 'cp' line to install the pre-push hook.

Revert "gnu: audacity: Use gtk+@3."

It appears that Audacity does not yet support GTK+-3 fully; the user interface
was unusable with this change.

This reverts commit 36e17ab417078710939771d5ab19976eec257309.

gnu: claws-mail: Update to 3.15.0.

* gnu/packages/mail.scm (claws-mail): Update to 3.15.0.

gnu: Add emacs-monroe.

* gnu/packages/emacs.scm (emacs-monroe): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu: Add emacs-keyfreq.

* gnu/packages/emacs.scm (emacs-keyfreq): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

profiles: Create fonts.dir/scale for all fonts directories.

* guix/profiles.scm (fonts-dir-file): Create fonts.dir/scale files for all
fonts directories.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

union: Add create-all-directories? parameter to 'union-build'.

* guix/build/union.scm (union-build): Add create-all-directories? keyword
parameter.
* tests/union.scm ("union-build #:create-all-directories? #t"): New test.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

gnu: perl-scalar-list-utils: Update to 1.47.

* gnu/packages/perl.scm (perl-scalar-list-utils): Update to 1.47.