gnu: mcelog: Update to 147.

* gnu/packages/linux.scm (mcelog): Update to 147.

gnu: xfig: Remove wrapper and clean up implementation.

* gnu/packages/xorg.scm (%app-defaults-dir): Make public.
* gnu/packages/xfig.scm (xfig)[attributes]: Remove wrapper and set
the XAPPLOADDIR in the Imakefile instead.

gnu: xfig: Use modify-phases.

* gnu/packages/xfig.scm (xfig): Use modify-phases.

gnu: xfd: Remove wrapper.

* gnu/packages/xorg.scm (xfd): Remove wrapper.

gnu: editres: Use %app-defaults-dir.

* gnu/packages/xorg.scm (editres): Replace string literal with
%app-defaults-dir.

gnu: xfontsel: Simplify definition.

* gnu/packages/xorg.scm (%app-defaults-dir): New variable.
(xfontsel): Remove wrapper.

services: Add 'redis-service-type'.

* gnu/services/database.scm (<redis-configuration>): New record type.
(%redis-accounts, redis-service-type): New variables.
(default-redis.conf, redis-activation, redis-shepherd-service): New
procedures.
* doc/guix.texi (Database Services): Document the new redis service.

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

gnu: ghc-semigroups: Update to 0.18.2.

* gnu/packages/haskell.scm (ghc-semigroups): Update to 0.18.2.

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

gnu: Add ghc-wave.

* gnu/packages/haskell.scm (ghc-wave): New variable.

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

gnu: ghc-quickcheck: Update to 2.8.2.

* gnu/packages/haskell.scm (ghc-quickcheck): Update to 2.8.2.

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

gnu: Add r-ggthemes.

* gnu/packages/statistics.scm (r-ggthemes):  New variable.

build: Remove reference to 'doc/emacs.texi'.

This is a followup to deb6276dda81a69da38e842d269c5370a28fa5cf.

* doc/local.mk (EXTRA_DIST): Remove 'emacs.texi'.

etc: Add 'indent-package.el' script.

* configure.ac: Check for 'emacs', substitute 'EMACS', and emit
'etc/indent-package.el'.
* etc/indent-package.el.in: New file.
* doc/contributing.texi (Formatting Code): Mention
'etc/indent-package.el'.
(Submitting Patches): Likewise, and link to the above node.

Co-authored-by: Alex Kost <alezost@gmail.com>

gnu: guix: Update development snapshot.

* gnu/packages/package-management.scm (guix-devel): Update to eefd042.

gnu: eudev: Add 'eudev-with-hwdb' variant that contains 'hwdb.bin'.

* gnu/packages/linux.scm (eudev-with-hwdb): New variable.
(usbutils)[inputs]: Use it instead of EUDEV.

gnu: Add r-txdb-mmusculus-ucsc-mm10-knowngene.

* gnu/packages/bioinformatics.scm (r-txdb-mmusculus-ucsc-mm10-knowngene): New variable.

gnu: bind: Update to 9.10.4-P5 [fixes CVE-2016-{9131,9147,9444}].

* gnu/packages/dns.scm (bind): Update to 9.10.4-P5.

gnu: isc-dhcp: Update bundled bind to 9.9.9-P5 [security fixes].

Fixes CVE-2016-{9131,9147,9444}.

* gnu/packages/admin.scm (isc-dhcp): Update bundled bind to 9.9.9-P5.

gnu: fprintd: Provide the right file name for 'fprintd.conf'.

* gnu/packages/freedesktop.scm (fprintd)[arguments]: New field.

perform-download: Add backward-compatible case.

This is meant to ease transition for people running an older guix-daemon
invoking a recent 'guix perform-download' with only one argument.

This is a followup to 9b5364a3afb03414bd6e3ded2fbfdacabe4e8870.

* guix/scripts/perform-download.scm (perform-download): Make 'output'
optional.  Bind 'output*' from DRV's "out" and honor it.
(guix-perform-download): Add clause with one argument.