* guix/scripts/package.scm (%options): Add the '--do-not-upgrade' option.
  (show-help): Document it.
  (options->installable): Add 'do-not-upgrade-regexps' variable.
  Use it in 'packages-to-upgrade'.
* doc/guix.texi (Invoking guix package): Document the '--do-not-upgrade'
  option.

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

* gnu/packages/patches/linux-libre-vblank-fix.patch: Remove file.
* gnu-system.am (dist_patch_DATA): Remove it.
* gnu/packages/linux.scm (linux-libre): Remove patch.

* gnu/packages/ruby.scm (ruby): Update to 2.2.2.

This reduces the number of references of the output from 54 to 31,
removing references notably to gcc, expat, glib:bin, ld-wrapper-0,
texinfo, pkg-config, make, gawk, binutils, etc.

Reported by David Thompson.

* gnu/packages/patches/emacs-exec-path.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/emacs.scm (emacs)[source]: Use it.

* gnu/packages/bioinformatics.scm (rseqc): Update hash.

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

* doc/guix.texi (Name Service Switch): Add link to nss-mdns.  Add
  example show how to pass #:name-services to 'nscd-service'.
  (Base Services): Add link from 'nscd-service' to the above.
* gnu/services/base.scm (nscd-service): Update docstring accordingly.

* gnu/packages/man.scm (man-pages): Update to 3.82.

* gnu/build/activation.scm (activate-ptrace-attach): New procedure.
* gnu/system.scm (operating-system-activation-script): Use it.

* Makefile.am (MODULES): Add guix/build-system/haskell.scm.

* gnu/packages/emacs.scm (emacs): Update to 24.5.

* gnu/system.scm (operating-system-boot-script): Clean out /tmp and
  /var/run before activating the system.

* gnu/packages/gstreamer.scm (gst-libav): New variable.

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

* etc/completion/bash/guix: New file.
* Makefile.am (dist_bashcompletion_DATA): New variable.
* configure.ac: Add --with-bash-completion-dir.

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

Reported by Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>.

* guix/http-client.scm (make-delimited-input-port): New procedure.
  Install it in (web response) for Guile <= 2.0.9.

Fixes <http://bugs.gnu.org/19795>.
Reported by David Thompson <dthompson2@worcester.edu>.

* gnu/build/activation.scm (enumerate, current-users, current-groups,
  delete-user, delete-group): New procedures.
  (activate-users+groups): Add calls to 'delete-user' and
  'delete-group'.
* doc/guix.texi (User Accounts): Add a paragraph about statelessness.
  Explain that passwords are preserved.

* gnu/packages/haskell.scm (ghc-http): New variable.

* gnu/packages/haskell.scm (ghc-network-uri): New variable.

* gnu/packages/haskell.scm (ghc-network): New variable.

* gnu/packages/haskell.scm (ghc-vector): New variable.

* gnu/packages/haskell.scm (ghc-parsec): New variable.

* gnu/packages/haskell.scm (ghc-split): New variable.

* gnu/packages/haskell.scm (ghc-unordered-containers): New variable.

* gnu/packages/haskell.scm (ghc-fgl): New variable.

* gnu/packages/haskell.scm (ghc-containers): New variable.

* gnu/packages/haskell.scm (ghc-syb): New variable.

* gnu/packages/haskell.scm (ghc-case-insensitive): New variable.

* gnu/packages/haskell.scm (ghc-quickcheck): New variable.

* gnu/packages/haskell.scm (ghc-tf-random): New variable.

* gnu/packages/haskell.scm (ghc-primitive): New variable.

* gnu/packages/haskell.scm (ghc-random): New variable.

* gnu/packages/haskell.scm (ghc-hunit): New variable.

* gnu/packages/haskell.scm (ghc-hashable): New variable.

* gnu/packages/haskell.scm (ghc-text): New variable.

* gnu/packages/haskell.scm (ghc-parallel): New variable.

* gnu/packages/haskell.scm (ghc-stm): New variable.

* gnu/packages/haskell.scm (ghc-zlib): New variable.