container: Pass a list of <file-system> objects as things to mount.

* gnu/build/linux-container.scm (mount-file-systems): 'mounts' is now a
list of <file-system> objects instead of a list of lists ("specs").
Add call to 'file-system->spec' as the argument to 'mount-file-system'.
(run-container, call-with-container): Adjust docstring accordingly.
* gnu/system/file-systems.scm (spec->file-system): New procedure.
* gnu/system/linux-container.scm (container-script)[script]: Call
'spec->file-system' inside gexp.
* guix/scripts/environment.scm (launch-environment/container): Remove
call to 'file-system->spec'.
* tests/containers.scm ("call-with-container, mnt namespace")
("call-with-container, mnt namespace, wrong bind mount"): Pass a list of
<file-system> objects.

linux-container: Use 'source-module-closure' when generating the script.

* gnu/system/linux-container.scm (container-script)[script]: Use
'source-module-closure' in 'with-imported-modules' form.

gnu: guix: Update development snapshot.

* gnu/packages/package-management.scm (guix-devel): Update to commit
324a2ba56c2f4c0d91567ed08024ae2c492f3b23.

gnu: gmsh: Update to 2.14.1

* gnu/packages/maths.scm (gmsh): Update to 2.14.1.
[source]: Use new uri.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu: milkytracker: Update upstream location.

* gnu/packages/music.scm (milkytracker)[source]: Update source uri.
[home-page]: Change to new domain.

Reported-by: ng0 <ng0@we.make.ritual.n0.is>

gnu: imagemagick: Update to 6.9.6-4.

* gnu/packages/imagemagick.scm (imagemagick): Update to 6.9.6-4.

gnu: claws-mail: Update to 3.14.1.

* gnu/packages/mail.scm (claws-mail): Update to 3.14.1.

gnu: Add pdfposter.

* gnu/packages/pdf.scm(pdfposter): New variable.

gnu: Add python2-pypdf.

* gnu/packages/pdf.scm (python2-pypdf): New variable.

gnu: Add python-pypdf2.

* gnu/packages/pdf.scm (python-pypdf2, python2-pypdf2): New variables.

gnu: gcc@5, gcc@6: Work around use of 'movabs' for /gnu/store strings.

Partly addresses <http://bugs.gnu.org/24703>.
Reported by Mark H Weaver <mhw@netris.org>.

* gnu/packages/patches/gcc-strmov-store-file-names.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/gcc.scm (gcc-5)[sources](patches): Add it.
(gcc-6)[sources](patches): Add it.

gnu: Add kdevelop-pg-qt.

* gnu/packages/kde.scm (kdevelop-pg-qt): New variable.

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

gnu: Add libkomparediff2.

* gnu/packages/kde.scm (libkomparediff2): New variable.

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

gnu: hidapi: Fix 'license'.

* gnu/packages/libusb.scm (hidapi)[license]: Actually call
'non-copyleft'.

gnu: Add vifm.

* gnu/packages/vim.scm (vifm): New variable.

gnu: libxslt: Fix CVE-2016-4738.

* gnu/packages/patches/libxslt-CVE-2016-4738.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/xml.scm (libxslt)[replacement]: New field.
(libxslt/fixed): New variable.

gnu: postgresql: Update to 9.5.5.

* gnu/packages/databases.scm (postgresql): Update to 9.5.5.
[home-page]: Use https.

gnu: mariadb: Update to 10.1.19.

* gnu/packages/databases.scm (mariadb): Update to 10.1.19.

gnu: Add pam-krb5 service.

* doc/guix.texi (Kerberos Services): New node.
* gnu/services/kerberos.scm: New file.
* gnu/local.mk: Add it.

gnu: Add faust-2.

* gnu/packages/audio.scm (faust-2): New variable.