* gnu/packages/statistics.scm (r-colorspace): Update to 1.3-2.

* gnu/packages/statistics.scm (r-statmod): New variable.

* gnu/packages/statistics.scm (r-ggbeeswarm): New variable.

* gnu/packages/statistics.scm (r-sourcetools): New variable.

* gnu/packages/statistics.scm (r-beeswarm): New variable.

* gnu/packages/statistics.scm (r-vipor): New variable.

* gnu/packages/image.scm (libpng-1.2): Update to 1.2.57.
[replacement]: New field.

* gnu/packages/patches/libpng-fix-null-ptr-dereference.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/image.scm (libpng)[replacement]: New field.
(libpng/fixed): New variable.

Fixes <http://bugs.gnu.org/25242>.
Reported by Leo Famulari <leo@famulari.name>.
The regression was introduced in 94d92c77.

* nix/libstore/build.cc (DerivationGoal::startBuilder): Set 'useChroot'
as a function 'of isBuiltin(drv)'.
(DerivationGoal::runChild): Use 'useChroot' instead of
'useChroot && !isBuiltin(drv)'.

* guix/import/elpa.scm (elpa-package->sexp): Import dependencies as
propagated-inputs.

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

* guix/import/elpa.scm (call-with-downloaded-file): Make function behaviour
match documentation string.

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

* gnu/packages/mpd.scm (mpd): Update to 0.19.21.

* gnu/packages/rust.scm (rustc): Update to 1.14.0.
  %rust-bootstrap-binaries: Update to 1.13.0.

Signed-off-by: David Craven <david@craven.ch>

* gnu/packages/mail.scm (mu)[arguments]: Rename "patch-configure.ac" to
"patch-configure" and only patch "configure" script; remove "autoreconf"
phase.
[native-inputs]: Remove "autoconf", "automake", "libtool", and
"texinfo".

* gnu/packages/mail.scm (mu): Update to 0.9.18.

* gnu/packages/zip.scm (perl-zip): Update to 1.59.

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

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

* gnu/packages/python.scm (python-straight-plugin, python2-straight-plugins):
New variables.

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

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

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

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

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

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

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

* gnu/packages/python.scm (python-pygit2, python2-pygit2): New variables.

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

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

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

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

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

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

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

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

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

* gnu/packages/shells.scm (xonsh): Update to 0.5.1.

* gnu/packages/python.scm (python-prompt-toolkit): Update to 1.0.9.

* gnu/packages/python.scm (python-markdown): Update to 2.6.7.

* gnu/packages/python.scm (python-numexpr): Update to 2.6.1.

* gnu/packages/python.scm (python-babel): Update to 2.3.4.

* gnu/packages/base.scm (glibc/hurd)[version]: Update to version 2.23.

* gnu/packages/xdisorg.scm (rofi): Update to 1.3.0.

* gnu/packages/messaging.scm (znc): Update to 1.6.4.

* gnu/packages/networking.scm (wireshark): Update to 2.2.3.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

* gnu/packages/emacs.scm (emacs-org): Update to 20161224.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

* gnu/packages/networking.scm (httpstat): New variable.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

* gnu/packages/python.scm (python-netcdf4, python2-netcdf4): New variables.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

* gnu/packages/bioinformatics.scm (r-rcas): Update to 1.1.1.
[propagated-inputs]: Add plotrix.

* gnu/packages/python.scm (python-pycrypto, python2-pycrypto): Add
comment.