* gnu/packages/lxde.scm (libfm-extra): New variable.

* gnu/packages/package-management.scm (guix-0.8.2): Rename to...
  (guix-0.8.3): ... this.  Adjust users.  Add 'disable-container-tests'
  phase.
  (guix): Set to GUIX-0.8.3.

* build-aux/check-available-binaries.scm: Rewrite to use 'substitutable-paths'
  instead of 'substitution-oracle'.  The latter does more than we need, and it
  no longer check the substitutability of valid items, which is not what we
  want.  Use 'lset-difference' instead of iterating over the items.

* gnu/packages/ocaml.scm (camlp4): New variable.

* guix/import/pypi.scm (guess-requirements): Add missing newline and quotes in
  warning.

* gnu/packages/markdown.scm (hoedown)[arguments]: Remove 'fix-makefile' phase.
  Add equivalent make-flags.

* gnu/packages/audio.scm (sox): New variable.

* gnu/packages/man.scm (man-db): Update to 2.7.1.
  [arguments]: Add '--with-systemdtmpfilesdir' to configure flags.

* gnu/packages/man.scm (libpipeline): Update to 1.4.0.

* gnu/packages/man.scm (man-db)[inputs]: Add 'util-linux'.
  [arguments]: Add '--with-col' to configure flags.

* gnu/packages/bioinformatics.scm (aragorn): New variable.

* gnu/packages/julia.scm (julia): Update to 0.3.10.
* gnu/packages/patches/julia-0.3.10-fix-empty-array.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.

* gnu/packages/version-control.scm (mercurial)[source]: Change URI scheme to
  https.

* gnu/packages/patches/libmad-armv7-thumb-pt1.patch,
  gnu/packages/patches/libmad-armv7-thumb-pt2.patch,
  gnu/packages/patches/libmad-frame-length.patch: New files.
* gnu-system.am (dist_patch_DATA): Add them.
* gnu/packages/mp3.scm (libmad)[source]: Add patches.

* gnu/packages/patches/tidy-CVE-2015-5522+5523.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/web.scm (tidy)[source]: Add patch.

* gnu/packages/dns.scm (bind-utils): Update to 9.10.2-P2.

* gnu/packages/web.scm (httpd): Update to 2.4.16.

* gnu/packages/databases.scm (postgresql): Update to 9.3.8.

* gnu/packages/maths.scm (pspp)[source]: Update to 0.8.5.
  [native-inputs]: Add TEXINFO.

* gnu/packages/datamash.scm (datamash): Update to 1.0.7.

* gnu/packages/gnunet.scm (libmicrohttpd): Update to 0.9.42.

* gnu/packages/nano.scm (nano): Update to 2.4.2.

Partly fixes <http://bugs.gnu.org/20765>.

* gnu/packages/python.scm (python-pillow)[arguments]: Rewrite using
  'modify-phases'.  Add 'disable-egg-compression' phase.

* emacs/guix-emacs.el: Require 'cl-lib', for 'cl-pushnew'.

* tests/containers.scm: Skip all tests if user namespaces do not exist.

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

* gnu/packages/package-management.scm (guix-devel): Update to 72cd8ec0.

* tests/gexp.scm ("gexp->derivation #:references-graphs"): Use 'lset=' instead
  of 'equal?' since the order in which references are listed in not
  guaranteed.

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

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

* gnu/packages/python.scm (python-rpy2, python2-rpy2): New variables.

This is a followup to commit 77411390.

* emacs/guix-emacs.el (guix-emacs-find-autoloads): Fix variable
  reference to 'elisp-root-dir'.

Signed-off-by: Alex Kost <alezost@gmail.com>

* gnu/packages/gcc.scm (gcc-5): Update to 5.2.0.  Remove
  gcc-arm-link-spec-fix.patch from patches.

This reflects the new version numbering scheme for GCC 5 and up.
See <https://gcc.gnu.org/develop.html>.

* gnu/packages/gcc.scm (gcc-5.1): Rename to ...
  (gcc-5): ... this.
  (libstdc++-doc-5.1): Rename to ...
  (libstdc++-doc-5): ... this, and use gcc-5.
* gnu/packages/commencement.scm (gcc-toolchain-5.1): Rename to ...
  (gcc-toolchain-5): ... this, and use gcc-5.
* build-aux/hydra/gnu-system.scm (%core-packages): Use gcc-5.

* gnu/system.scm (<operating-system>)[kernel]: Change default to
  LINUX-LIBRE-4.0.

Previously, before replying to a /nar/* request, 'guix publish' would first
build up the whole nar into memory (as a consequence of
<http://bugs.gnu.org/21093>), which obviously doesn't scale.

* guix/scripts/publish.scm (render-nar): Return STORE-PATH instead of a
  procedure that calls 'write-file'.
  (sans-content-length): New procedure.
  (http-write): For 'x-nix-archive', don't call '%http-write'.  Instead, call
  'write-file' right from here, using BODY as the file name.