perf: Make build fix for 3.13 cleaner.
nixos: add uid/gid for munin

To be compatible with eb2f44c18cb6d300e965308547d8a4dea110f519 (Generate
/etc/passwd and /etc/group at build time). Without this you'll get this:

  $ nixos-rebuild build
  [...]
  user-thrown exception: The option `users.extraGroups.unnamed-9.1.gid' is used but not defined.
Add dconf to GIO_EXTRA_MODULES so ibus-setup doesn't use the memory backend.
gnash: Hack to define nullptr as NULL, since some included mozilla headers seem to want nullptr
Merge remote-tracking branch 'official/master' into firefox_27
add guile-xcb 1.3
mumble: Upgrade 1.2.4 -> 1.2.5
murmur: Upgrade 1.2.4 -> 1.2.5
rtmpdump: fix build by reverting to gnutls31
Merge pull request #1703 from PkmX/pr-ibus

Fix ibus-setup
libchop: fix build by reverting to gnutls31

The errors were a bit cryptic.
CC @viric.
Merge master into x-updates
spring: disable parallel building, as it breaks on Hydra

(cherry picked from commit e43018e0196dd6af57087ecb6aaa3af7b17776ab)
llvmPackages on darwin: attempt to fix build by using gcc48
andagii: fix fetch by providing a different user-agent

Close #1706.
Merge pull request #1702 from vlstill/perf-fix

perf: Allow proceeding in build even if patch fails.
kde410.kde_workspace: fix CVE-2013-4132 by upstream patch
linux: minor updates 3.12.10, 3.10.29, 3.4.79
Merge #1699: firefox-27.0 and nss-3.15.4
gnome3.gnome_control_center: build and fix runtime deps