* gnu/packages/patches/guile-linux-syscalls.patch: Add 'umount' subr.

* gnu/packages/linux.scm (extundelete): New variable.

* gnu/packages/algebra.scm (gp2c): Update to 0.0.9pl3.

* gnu/packages/algebra.scm (arb): Update to 2.7.0.

* gnu/packages/parallel.scm (parallel): Update to 20150722.

* gnu/packages/telephony.scm (ucommon): Update to 6.3.6.

* gnu/packages/video.scm (ffmpeg): Update to 2.7.2.

* gnu/packages/games.scm (retroarch): Update to 1.2.2.

Reported by Anders Jonsson <anders.jonsson@norsjovallen.se>.

* gnu/packages/backup.scm, gnu/packages/databases.scm,
  gnu/packages/linux.scm, gnu/packages/perl.scm,
  gnu/packages/web.scm, guix/scripts/lint.scm,
  guix/scripts/publish.scm: Fix typos in translatable strings.

* doc/guix.texi (Setuid Programs): Fix typos.

* gnu/packages/tor.scm (tor): Update to 0.2.6.10.

Suggested by Malcolm Cook <MEC@stowers.org>.

* doc/guix.texi (Binary Installation): Suggest --warning=no-timestamp.

* gnu/packages/linux.scm (linux-libre): Update to 4.1.3.
  (linux-libre-4.0): Update to 4.0.9.

Fixes <http://bugs.gnu.org/21111>.
Reported by Dave Love <fx@gnu.org>.

* doc/guix.texi (Binary Installation): Add paragraph about "implausibly old
  time stamps" warning from tar.

* guix/scripts/size.scm (show-help, %options): Add --substitute-urls.
  (%default-options): Add 'substitute-urls'.
  (guix-size): Honor it.
* doc/guix.texi (Invoking guix size): Document it.

* guix/derivations.scm (substitution-oracle): Improve docstring.

* guix/derivations.scm (substitution-oracle): Use a final 'concatenate'
  instead of repeated 'append's.

Suggested by remo_ on IRC.

* doc/guix.texi (System Installation): Explicitly mention user account
  passwords.
  (User Accounts): Add 'user-account-password' anchor.

* guix/scripts/import/hackage.scm (guix-import-hackage): Fix error message for
  imports from stdin, which referred to unbound variable 'package-name'.

* guix/scripts/size.scm (profile->page-map): Remove leftover 'pk'.

* gnu/packages/guile.scm (minikanren): Fix output location for README.org

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

* gnu/packages/fontutils.scm (teckit): Update to 2.5.4. Drop patch.
  Use svn-fetch for download.
  [arguments]: Add phase to call autogen.
  [native-inputs]: New field.
* gnu/packages/patches/teckit-cstdio.patch: Delete file.
* gnu-system.am (dist_patch_DATA): Unregister patch.

* gnu/packages/emacs.scm (git-modes)[source]: Add 'file-name' field.

* gnu/packages/ratpoison.scm (ratpoison)[inputs]: Add "libxinerama".

* gnu/packages/package-management.scm (guix-devel): Update to commit 5d09263b.
  Prefix version string with "0.8.3.".
  (guix): Set to GUIX-DEVEL.

* gnu/packages/audio.scm (libsbsms)[arguments]: Add "--disable-sse" to
  configure-flags unless on x86_64.

* gnu/packages/audio.scm (libsbsms)[arguments]: Use modify-phases.

* gnu/packages/lxde.scm (lxrandr): New variable.

* gnu/packages/lxde.scm (lxtask): New variable.

* gnu/packages/lxde.scm (lxterminal): New variable.

* gnu/packages/lxde.scm (pcmanfm): New variable.

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

* gnu/packages/lxde.scm (menu-cache): New variable.

* 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.