gnu: enlightenment: Update to 0.21.5.

* gnu/packages/enlightenment.scm (enlightenment): Update to 0.21.5.

gnu: tor: Update to 0.2.9.8.

* gnu/packages/tor.scm (tor): Update to 0.2.9.8.

services: guix: Add 'log-file' configuration option.

* gnu/services/base.scm (<guix-configuration>)[log-file]: New field.
(guix-shepherd-service): Pass #:log-file to 'make-forkexec-constructor'.
* gnu/services/admin.scm (simple-rotation-config): Take a list of
files and join them with commas.
(%default-rotations): Add /var/log/guix-daemon.log.
* doc/guix.texi (Base Services): Document it.

services: guix: Remove dependency on lsh.

* gnu/services/base.scm (<guix-configuration>)[lsh]: Remove.
(guix-shepherd-service): Remove lsh from 'PATH'.
* doc/guix.texi (Base Services): Adjust accordingly.

services: cuirass: Cache defaults to /var/cache/cuirass.

The previous default value depended on the 'HOME' environment variable,
which happened to be unset.  Thus, /.cache was being used.

* gnu/services/cuirass.scm (<cuirass-configuration>)[cache-directory]:
Change default value to "/var/cache/cuirass".
(cuirass-shepherd-service): Always pass "--cache-directory".
(cuirass-activation): New procedure.
(cuirass-service-type): Use it as an extension to
ACTIVATION-SERVICE-TYPE.
* doc/guix.texi (Continuous Integration): Adjust accordingly.

services: cuirass: Honor 'user' and 'group'.

* gnu/services/cuirass.scm (cuirass-shepherd-service): Pass the user and
group of CONFIG to 'make-forkexec-constructor'.

services: cuirass: Add 'log-file' option.

* gnu/services/cuirass.scm (<cuirass-configuration>)[log-file]: New
field.
(cuirass-shepherd-service): Pass it to 'make-forkexec-constructor'.

gnu: cuirass: Add Git to 'PATH'.

* gnu/packages/ci.scm (cuirass)[arguments]: In 'wrap-program' phase, add
Git to 'PATH'.
[inputs]: Add GIT.

gnu: utox: Fix description.

* gnu/packages/messaging.scm (utox): Fix description.

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

gnu: utox: Update to 0.11.0.

* gnu/packages/messaging.scm (utox): Update to 0.11.0.
[source]: Update source uri to new group namespace on github.
[build-system]: Change to cmake-build-system.
[arguments]: Remove previous content and disable tests,
add two new phases.
[inputs]: Remove libtoxcore, add c-toxcore.
[native-inputs]: Remove it.

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

gnu: Add c-toxcore.

* gnu/packages/messaging.scm (c-toxcore): New variable.

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

install: The list of services is now a plain list.

* gnu/system/install.scm (installation-services): Rename to...
(%installation-services): ... this.  Turn into a list instead of a thunk.

gnu: Add grub-efi.

* gnu/packages/grub.scm (grub-efi): New variable.

Revert "gnu: grub: Add dependency on efibootmgr."

This reverts commit 3eee16130d858ae96510ec1c7d38d31290de2699.

Reverted in favor of separate grub-efi package. See discussion at
https://lists.gnu.org/archive/html/guix-devel/2016-12/msg00765.html .

gnu: grub: Use qemu-minimal for tests.

* gnu/packages/grub.scm (qemu-for-tests): Remove variable.
(grub)[native-inputs]: Replace QEMU-FOR-TESTS with QEMU-MINIMAL.

gnu: linux-libre: Fix typo.

* gnu/packages/linux.scm (%linux-libre-hash): Remove excess quote.

gnu: cutadapt: Update to 1.12.

* gnu/packages/bioinformatics.scm (cutadapt): Update to 1.12.
[inputs]: Add python-xopen.

gnu: Add python-xopen.

* gnu/packages/python.scm (python-xopen, python2-xopen): New variables.

gnu: linux-libre: Update to 4.8.15.

* gnu/packages/linux.scm (%linux-libre-version, %linux-libre-hash)
(linux-libre): Update to 4.8.15.

Revert "gnu: linux-libre: Update to 4.9."

This reverts commit 5a3849443ac8bdcffea0376b3c7efa30688c10bb.

Module loading is broken on i686 with some configurations, including our
default configuration.  See <https://bugs.gnu.org/25231>.