offload: Increase the connection timeout.

* guix/scripts/offload.scm (open-ssh-session): Set #:timeout to 10.

offload: Send the build log to the right file descriptor.

This fixes a regression introduced in
21531add3205e400707c8fbfd841845f9a71863a whereby the build log would no
longer be sent to FD 4, thereby leading the daemon to not see the build
log.

* guix/scripts/offload.scm (transfer-and-offload): Parameterize
CURRENT-BUILD-OUTPUT-PORT.

gnu: guix: Update development snapshot.

* gnu/packages/package-management.scm (guix-devel): Update to e11c42f.

offload: Fix plural of some messages.

* guix/scripts/offload.scm (send-files): Use 'N_' for possibly plural
message.  Write "store item" instead of "store file".
(retrieve-files): Likewise.

offload: Make the compression methods configurable.

* guix/scripts/offload.scm (<build-machine>)[compression]
[compression-level]: New fields.
(open-ssh-session): Honor them.
* doc/guix.texi (Daemon Offload Setup): Document them.

guix system: If the new system generation already exists, overwrite it.

Fixes <http://bugs.gnu.org/25100>.

Before that, 'guix system reconfigure' would fail if the next generation
already existed.

* guix/scripts/system.scm (switch-to-system): Use 'switch-symlink'
instead of 'symlink'.
* doc/guix.texi (Using the Configuration System, Invoking guix system):
Document the behavior.

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

gnu: i3-wm: Update to 4.13.

* gnu/packages/wm.scm (i3-wm): Update to 4.13.
[arguments]: Pass '-std=c11' to #:make-flags. Provide path to XML_CATALOG_FILES.
Pass '--disable-builddir' to #:configure-flags. Re-enable the 'configure' phase
to adjust to new Autotools build system.
[inputs]: Add xcb-util-xrm.
[native-inputs]: Add docbook-xsl.

gnu: xcb-util-cursor: Propagate dependencies from 'xcb-cursor.pc'.

* gnu/packages/xorg.scm (xcb-util-cursor)[inputs]: Move xcb-util-renderutil and
xcb-util-image to ...
[propagated-inputs]: ... here.

gnu: ruby-2.2, ruby-2.1, ruby-1.8: Don't replace with ruby-2.3.3.

* gnu/packages/ruby.scm (ruby-2.2, ruby-2.1, ruby-1.8)[replacement]: New field.

gnu: guix: Update development snapshot.

* gnu/packages/package-management.scm (guix-devel): Update to 9328eaf.

services: file-system: Make sure fsck.* commands are in $PATH.

Fixes a regression introduced in
bf7ef1bb848db0977b54ea012789adc68751c68a, whereby the fsck.* commands
would not be found.

* gnu/services/base.scm (file-system-shepherd-service): Call calls to
'setenv'.

nls: Adjust to geeqie.scm removal.

This is a followup to d1a5b20081c30da7503201df260cf20b8d0ba633.

* po/packages/POTFILES.in: Remove gnu/packages/geeqie.scm.

refresh: Indicate that PACKAGE... is optional.

* guix/scripts/refresh.scm (show-help): Add brackets around PACKAGE.

gnu: fuse-exfat: Update to 1.2.5.

* gnu/packages/linux.scm (fuse-exfat): Update to 1.2.5.
[native-inputs]: Remove scons build system which is no longer used.
[arguments]: Remove.
[home-page]: Replace dead Google Code home page.

gnu: exfat-utils: Update to 1.2.5.

* gnu/packages/mtools.scm (exfat-utils): Update to 1.2.5.

gnu: Add mktorrent.

* gnu/packages/bittorrent.scm (mktorrent): New variable.

offload: Add "test" sub-command.

* guix/scripts/offload.scm (assert-node-repl, assert-node-has-guix)
(nonce, assert-node-can-import, assert-node-can-export)
(check-machine-availability): New procedures.
(%random-state): New variable.
(guix-offload): Add case for "test".
* doc/guix.texi (Daemon Offload Setup): Document it.  Remove obsolete
bit about remote invocation of 'guix build'.

daemon: Fix invalid Boost format string.

* nix/libstore/optimise-store.cc (LocalStore::optimisePath_): Use %3%
instead of %m, the latter being an invalid Boost format specifier.

gnu: python-flask: Propagate python-click.

* gnu/packages/python.scm (python-flask, python2-flask)[native-inputs]: Move
python-click to ...
[propagated-inputs]: ... here.

gnu: shepherd: Update to 0.3.2.

* gnu/packages/admin.scm (shepherd): Update to 0.3.2.
[properties]: New field.