* gnu/packages/mpd.scm (ncmpcpp): Update to 0.6.7.

* gnu/packages/patches/qemu-CVE-2015-3209.patch,
  gnu/packages/patches/qemu-CVE-2015-4037.patch,
  gnu/packages/patches/qemu-CVE-2015-4103.patch,
  gnu/packages/patches/qemu-CVE-2015-4104.patch,
  gnu/packages/patches/qemu-CVE-2015-4105.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt1.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt2.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt3.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt4.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt5.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt6.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt7.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt8.patch,
  gnu/packages/patches/qemu-CVE-2015-5745.patch: Delete files.
* gnu/packages/patches/qemu-CVE-2015-6855.patch: New file.
* gnu-system.am (dist_patch_DATA): Add the new patch and delete the old ones.
* gnu/packages/qemu.scm (qemu-headless): Update to 2.4.0.1.  Add the new patch
  and delete the old ones.

* guix/scripts/lint.scm (check-description-style): Set 'field' parameter
  when emitting a warning in 'check-texinfo-markup'.  Catch any error
  that may occur in during the 'texi->plain-text' conversion.  This is a
  followup to commit 2748ee3b.

* gnu/packages/ibus.scm (ibus)[inputs]: Add the required gtk+-3.

Fixes the wrong-type-arg exception initially reported
at <http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19976#5>
by Ricardo Wurmus <rekado@elephly.net>.

* guix/http-client.scm (read-chunk-header): Backport Guile commit 53b8d5f.

* gnu/packages/compression.scm (squashfs-tools): New variable.

* guix/scripts/offload.scm (send-files): Use gzip --fast instead of xz.

* guix/utils.scm (compressed-output-port,
  call-with-compressed-output-port): Add #:options parameter and honor
  it.

* gnu/packages/messaging.scm (gajim): New variable.

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

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

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

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

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

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

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

* gnu/packages/python.scm (python2-ipaddress): New variable.

* gnu/packages/package-management.scm (guix-devel): Update to abbe2c61.

* configure.ac: Change version to 0.9.0.

* gnu/packages/base.scm (glibc-locales)[arguments]: Remove
  'delete-file-recursively' call from 'build' phase.
* gnu/packages/patches/glibc-locales.patch: Adjust to glibc 2.22.

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

* emacs/guix-build-log.el (guix-build-log-phase-end-regexp): Handle
  fractional number of seconds (like "0.8").

* gnu/packages/tcl.scm (tk)[arguments]: Use 'modify-phases'.  Add
  'add-fontconfig-flag' phase.
  [inputs]: Add FONTCONFIG.

* guix/scripts/lint.scm (properly-starts-sentence?): Match Texinfo
  highlighting commands as a sentence start.

* guix/ui.scm (texi->plain-text): Export.
* guix/scripts/lint.scm (check-description-style): Use it instead of
  'package-description-string'.

This avoids gratuitous queries of the substituter.

* guix/profiles.scm (ghc-package-cache-file): Pass #:substitutable? #f
  to 'gexp->derivation'.
  (ca-certificate-bundle): Likewise.
  (gtk-icon-themes): Likewise.
  (profile-derivation): Likewise.
  (info-dir-file): Likewise, plus #:local-build? #t.

Fixes <http://bugs.gnu.org/21536>.
Reported by Alex Kost <alezost@gmail.com>.

* guix/ui.scm (texi->plain-text): Wrap body in 'with-fluids'.
* tests/ui.scm ("package-description-string vs. Unicode"): New test.

Fixes a regression introduced in a8be7b9a.

* guix/build/download.scm (store-path-abbreviation): Return STORE-PATH
  if it's not an actual store path.  Fixes an out-of-range exception
  when running tests/substitute.scm and tests/store.scm.

Reported by Mark H Weaver <mhw@netris.org>.

* tests/build-utils.scm ("wrap-program, one input, multiple calls"): Add
  'unsetenv' call.

* doc/guix.texi (Application Setup): Add anchor and index entry.
  (Locales): Refer to it.  Mention /run/current-system/locale.

* gnu/packages/python.scm (python-pyasn1, python2-pyasn1): New
  variables.

* gnu/packages/python.scm (python-cffi): Update to 1.2.1.
  [native-inputs]: Add python-pytest.
  [arguments]: Enable tests.

* tests/cran.scm: Expect output to use "cran-uri" procedure.

This is a followup to commit 140b4bc6.

* tests/packages.scm ("package-source-derivation, snippet")[source]: Add
  'chmod' call for "..".

* guix/build/download.scm
  (string-pad-middle): Allow resulting padded string to overflow.
  (store-url-abbreviation): Remove unnecessary procedure.
  (progress-proc): Use BASENAME as default for parameter 'abbreviation'.
  (url-fetch): Display extra newlines for readability.

Fixes a regression introduced in b7c7c03e.

* guix/build/emacs-build-system.scm (package-name-version->elpa-name-version):
  Remove unused 'name' binding.  Do not abuse 'strip-store-file-name' to
  remove the "emacs-" prefix, which worked before b7c7c03e but not after.

Suggested by Ludovic Courtès <ludo@gnu.org>.

* emacs/guix-guile.el (guix-guile-definition-regexp): New variable.
  (guix-guile-current-definition, guix-guile-boolean): New functions.
* emacs/guix-devel.el: Require 'guix-base'.
  (guix-devel-repl-processes): New variable.
  (guix-devel-setup-repl, guix-devel-setup-repl-maybe): New functions.
  (guix-devel-build-package-definition): New command.
* doc/emacs.texi (Emacs Development): Document it.

* emacs/guix-guile.el (guix-guile-current-module): New function.
* emacs/guix-devel.el: New file.
* emacs.am (ELFILES): Add it.
* doc/emacs.texi (Emacs Development): New node.
  (Emacs Interface): Add it.
* doc/contributing.texi (The Perfect Setup): Mention it.
* doc/guix.texi (Top): Add it.
* emacs/guix-init.el: Add 'guix-devel-activate-mode-maybe' to
  'scheme-mode-hook'.