gnu: neomutt: Don't rewrite the source file-name.

* gnu/packages/mail.scm (neomutt)[file-name]: Remove field.

gnu: neomutt: Update to 20170421.

* gnu/packages/mail.scm (neomutt): Update to 20170421.
[native-inputs]: Add 'gettext-minimal'.
[description]: Clarify the state of neomutt as it is now a microfork of mutt.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: icecat: Fix GTK 3 file chooser crash.

* gnu/packages/gnuzilla.scm (icecat)[arguments]: Add a 'wrap-program' phase to
set XDG_DATA_DIRS.

gnu: Add mcomix.

* gnu/packages/image-viewers.scm (mcomix): New variable.

Signed-off-by: Arun Isaac <arunisaac@systemreboot.net>

store: Support 'ssh://' URIs in 'GUIX_DAEMON_SOCKET'.

This allows 'guix' commands to talk to a remote store over SSH.

* guix/store.scm (connect-to-daemon)[connect]: Call 'resolve-interface'
for unknown URI schemes.
* guix/store/ssh.scm: New file.
* Makefile.am (MODULES): Add it.
* doc/guix.texi (The Store): Document it.  Mark remote access as
experimental.

ssh: Decompose 'connect-to-remote-daemon'.

* guix/ssh.scm (remote-daemon-channel): New procedure.
(connect-to-remote-daemon): Implement in terms of it.

ssh: Move 'open-ssh-session' to (guix ssh).

* guix/scripts/copy.scm (%compression, open-ssh-session): Move to...
* guix/ssh.scm: ... here.  Use '&message' conditions instead of calling
'leave'.

offload: Avoid using '_' as a 'match' pattern.

* guix/scripts/offload.scm (host-key->type+key, machine-load)
(process-request, guix-offload): Do not use '_' as a 'match' pattern.

store: Add support for remote connections via 'guix://' URIs.

* guix/store.scm (open-inet-socket): New procedure.
(connect-to-daemon): Support the 'guix' URI scheme.
* doc/guix.texi (The Store): Document it.

store: Add 'system-error-to-connection-error' macro.

* guix/store.scm (system-error-to-connection-error): New macro.
(open-unix-domain-socket): Use it instead of 'catch'.

store: 'GUIX_DAEMON_SOCKET' can now be a URI.

* guix/store.scm (%daemon-socket-file): Rename to...
(%daemon-socket-uri): ... this.
(connect-to-daemon): New procedure.
(open-connection): Rename 'file' to 'uri'.  Use 'connect-to-daemon'
instead of 'open-unix-domain-socket'.
* guix/tests.scm (open-connection-for-tests): Rename 'file' to 'uri'.
* tests/guix-build.sh: Add tests.
* tests/store.scm ("open-connection with file:// URI"): New tests.

gnu: guile: Update to 2.2.2.

* gnu/packages/guile.scm (guile-2.2): Update to 2.2.2.

gnu: imlib2: Update to 1.4.10.

* gnu/packages/image.scm (imlib2): Update to 1.4.10.

gnu: sdl-gfx: Update to 2.0.26.

* gnu/packages/sdl.scm (sdl-gfx): Update to 2.0.26.

gnu: portaudio: Update to 190600.20161030.

* gnu/packages/audio.scm (portaudio): Update to 190600.20161030.
* gnu/packages/patches/portaudio-audacity-compat.patch: Adjust line endings.

gnu: soxr: Update to 0.1.2.

* gnu/packages/audio.scm (soxr): Update to 0.1.2.

gnu: python-pyopenssl: Update to 17.0.0.

* gnu/packages/python.scm (python-pyopenssl, python2-pyopenssl): Update to 17.0.0.
[native-inputs]: Change PYTHON-PYTEST to PYTHON-PYTEST-3.0.
* gnu/packages/patches/python-pyopenssl-skip-network-test.patch: Adjust.

gnu: proteinortho: Update to 5.16.

* gnu/packages/bioinformatics.scm (proteinortho): Update to 5.16.

gnu: diamond: Update to 0.8.38.

* gnu/packages/bioinformatics.scm (diamond): Update to 0.8.38.

gnu: miniupnpc: Use @dfn mark-up.

gnu/packages/upnp.scm (miniupnpc)[description]: Use @dfn.