build-system/gnu: Fix reference to Gettext in 'dist-package'.

* guix/build-system/gnu.scm (dist-package): Change 'gettext' to
  'gnu-gettext'.

derivations: Use more keyword parameters for 'build-expression->derivation'.

* guix/derivations.scm (build-expression->derivation): Turn 'system' and
  'inputs' into keyword parameters.
  Adjust callers accordingly.
* gnu/system/linux.scm, gnu/system/vm.scm, guix/build-system/cmake.scm,
  guix/build-system/gnu.scm, guix/build-system/perl.scm,
  guix/build-system/python.scm, guix/build-system/trivial.scm,
  guix/download.scm, guix/packages.scm, guix/profiles.scm,
  guix/scripts/pull.scm, tests/derivations.scm, tests/guix-build.sh,
  tests/monads.scm, tests/store.scm, tests/union.scm: Adjust users of
  'build-expression->derivation' and 'derivation-expression'
  accordingly.
* doc/guix.texi (Derivations): Adjust 'build-expression->derivation'
  documentation accordingly.
  (The Store Monad): Likewise for 'derivation-expression'.

Augment 'gitignore'.

nls: Add Vietnamese translation.

* po/vi.po: New file.
* po/LINGUAS: Add 'vi'.

Update 'eo.po'.

gnu: ffmpeg: Disable tests.

* gnu/packages/video.scm (ffmpeg): Disable tests, see
    https://trac.ffmpeg.org/ticket/3177 .

gnu: Add Guile-SSH.

* gnu/packages/guile.scm (guile-ssh): New variable.

gnu: libssh: Add $libdir to RUNPATH of libssh_threads.so.

* gnu/packages/ssh.scm (libssh)[arguments]: Add #:phases, #:modules, and
  #:imported-modules.
  [native-inputs]: New field.

gnu: Improve synopses in vpn.scm.

* gnu/packages/vpn.scm (vpnc): Shorten synopsis, and fix spelling.
  (openconnect): Fix synopsis spelling.

gnu: Add missing copyright line.

* gnu/packages/vpn.scm: Add copyright line lost in commit 7af8a9b.

gnu: patchelf: Shorten synopsis.

* gnu/packages/patchelf.scm (patchelf): Shorten synopsis.

Add GNU Serveez

* gnu/packages/serveez.scm: New file
* gnu-system.am (GNU_SYSTEM_MODULES): Add it

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

gnu: Add mtools.

* gnu/packages/mtools.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

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

gnu: Add gnu-pw-mgr

* gnu/packages/gnu-pw-mgr.scm: New file
* gnu-system.am (GNU_SYSTEM_MODULES): Add it

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

gnu: Move GVPE to vpn.scm.

* gnu/packages/vpn.scm (gvpe): New variable, moved from...
* gnu/packages/gvpe.scm: ... here.  Remove.
* gnu-system.am (GNU_SYSTEM_MODULES): Remove 'gvpe.scm'.

gnu: Add Guile-WM.

* gnu/packages/guile-wm.scm (guile-wm): New variable.

gnu-maintenance: Ignore "redirect" blurbs.

* guix/gnu-maintenance.scm (official-gnu-packages)[official-description]:
  Return #f for blurbs that start with "redirect ".

gnu: dmd: Update start/stop of standard service definitions.

* gnu/system/dmd.scm (mingetty-service): Add 'stop' field.
  (nscd-service): Run with '--foreground'.  Change 'stop' to use
  'make-kill-destructor'.
  (syslog-service): Run with '--no-detach'; change 'stop' similarly.
  (guix-service): Likewise for 'stop'.
  (static-networking-service): Remove 'sleep' call from 'start'.  Change
  'stop' to return #f when networking was actually stopped.

gnu: dmd: Upgrade to 0.1.

* gnu/packages/system.scm (dmd): Upgrade to 0.1.  Move PKG-CONFIG to
  'native-inputs'.

gnu: Add Guile-XCB.

* gnu/packages/guile-wm.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.