graph: 'export-graph' takes a #:reverse-edges? parameter.

* guix/scripts/graph.scm (export-graph): Add #:reverse-edges? parameter
  and honor it.

services: 'dmd-service-type' takes a service name.

* gnu/services/dmd.scm (dmd-service-type): Add 'service-name'
  parameter.
* gnu/services/base.scm, gnu/services/networking.scm,
  gnu/system/install.scm: Adjust callers.

services: Export 'service-back-edges'.

* gnu/services.scm: Export 'service-back-edges' and <service-type>
  accessors.
* tests/services.scm ("service-back-edges"): New test.

build-system/gnu: dist-package: Use 'autoconf-wrapper'.

* guix/build-system/gnu.scm (dist-package): Use AUTOCONF-WRAPPER instead
  of AUTOCONF.

hydra: Add Graphviz and help2man as inputs to the Guix job set.

* build-aux/hydra/guix.scm (tarball-package): Add GRAPHVIZ and HELP2MAN
  to 'native-inputs' of GUIX.

gnu: diamond: Restrict supported systems to x86_64-linux.

* gnu/packages/bioinformatics.scm (diamond) [supported-systems]: Restrict to
  x86_64-linux.

gnu: abbaye: Use 'sdl-union'.

* gnu/packages/games.scm (abbaye)[inputs]: Use 'sdl-union'.
  [arguments]: Adjust 'set-sdl-paths' phase accordingly.

emacs: devel: Add indentation rules.

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

* emacs/guix-devel.el: Add indentation rules for Guix macros/procedures.
  (guix-devel-scheme-indent): New macro.
  (guix-devel-indent-package): New function.

gnu: icecat: Update to 38.3.0-gnu1.

* gnu/packages/patches/icecat-CVE-2015-4473-partial.patch,
  gnu/packages/patches/icecat-CVE-2015-4482.patch,
  gnu/packages/patches/icecat-CVE-2015-4488.patch,
  gnu/packages/patches/icecat-CVE-2015-4489.patch,
  gnu/packages/patches/icecat-CVE-2015-4491.patch,
  gnu/packages/patches/icecat-CVE-2015-4492.patch,
  gnu/packages/patches/icecat-CVE-2015-4495.patch,
  gnu/packages/patches/icecat-enable-acceleration-and-webgl.patch,
  gnu/packages/patches/icecat-libvpx-1.4.patch: Delete files.
* gnu/packages/patches/icecat-avoid-bundled-includes.patch: New file.
* gnu-system.am (dist_patch_DATA): Add new patch.  Remove the deleted ones.
* gnu/packages/gnuzilla.scm (icecat): Update to 38.3.0-gnu1.
  [source]: Add new patch.  Remove the deleted ones.
  [inputs]: Add libxcomposite.
  [arguments]: Add 'ensure-no-mtimes-pre-1980' phase.  Adapt
  'remove-h264parse-from-blacklist' and
  'arrange-to-link-libxul-with-libraries-it-might-dlopen' phases to the
  new version.

gnu: geiser: Update to 0.8.1.

* gnu/packages/emacs.scm (geiser): Update to 0.8.1.

gnu: python-rpy2: Add "zlib" to native-inputs.

* gnu/packages/python.scm (python-rpy2)[native-inputs]: Add "zlib".

gnu: python-scipy, python2-scipy: Update to 0.16.0.

* gnu/packages/python.scm (python-scipy, python2-scipy): Update to
  0.16.0.

gnu: python-scipy, python2-scipy: Propagate Python inputs.

* gnu/packages/python.scm (python-scipy)[inputs]: Move "python-numpy",
  "python-matplotlib", and "python-pyparsing" to propagated-inputs; move
  "python-nose" and "python-sphinx" to native-inputs.
  [propagated-inputs]: New field.
  [native-inputs]: Move "python-nose" and "python-sphinx" from inputs
  field here.
  (python2-scipy): Modify propagated-inputs instead of inputs field.

gnu: icedtea6: Update to 1.13.8.

* gnu/packages/java.scm (icedtea6): Update to 1.13.8.

gnu: icedtea6: Replace "ant-bootstrap" with "ant".

* gnu/packages/java.scm (icedtea6)[native-inputs]: Replace
  "ant-bootstrap" with "ant".
  [arguments]: Remove steps to unpack and use "ant-bootstrap".
  (icedtea7)[native-inputs]: Remove explicit references to
  "ant-bootstrap" and "ant".

gnu: ant: Build with GCJ.

* gnu/packages/java.scm (ant)[native-inputs]: Replace "icedtea6" with
  "gcj".

gnu: gcj-4.8, gcj: Update to default GCC version.

* gnu/packages/gcc.scm (gcj-4.8): Inherit from "gcc" package and rename
  variable to...
  (gcj): ...this new variable.
  (ecj-bootstrap-4.8): Rename variable to...
  (ecj-bootstrap): ...this, updating to version 4.9.
* gnu/packages/java.scm (icedtea6)[native-inputs]: Replace "gcj-4.8"
  with "gcj".
* gnu/packages/music.scm (tuxguitar)[native-inputs]: Likewise.

gnu: abbaye: Use 'modify-phases'.

* gnu/packages/games.scm (abbaye)[arguments]: Use 'modify-phases'.

gnu: Add manaplus.

* gnu/packages/games.scm (manaplus): New variable.

build-system/python: Memoize the results of 'package-with-python2'.

Fixes <http://bugs.gnu.org/21675>.
Reported by Cyril Roelandt <tipecaml@gmail.com>.

Before this change, the command:

  guix build python2-oslo.utils -n --no-substitutes

would take 17.5s.  After, it is down to 2.9s.
Likewise, the command:

  guix graph python2-bandit | grep python2-setuptools.*Helve| wc -l

would return 412 nodes before, all functionally equivalent, and returns
a single one now.

* guix/build-system/python.scm (package-with-explicit-python): Remove
  'p' parameter.  Change to return a one-argument memoizing procedure.
  (package-with-python2): Adjust accordingly.