Enable mcrypt, intl and exif support in PHP
php: Add xsl optional support

Use an override with xsl = true to enable xsl support in php.
php: Add mcrypt optional support

Use an override with mcrypt = true to enable libmcrypt support in php.
The --disable-posix-threadsds mcrypt build option was required by php.
php: Add zip and optional bz2 support

Use the overload bz2 = true to enable bz2 support for php.
zip support is enabled by default as it doesn't require any library.
Remove misconfigured mcrypt support
Merge remote-tracking branch 'bbenoist/phpfix' into php

Conflicts:
	pkgs/development/interpreters/php/5.3.nix
Merge remote-tracking branch 'upstream/master' into php
haskell-gitit: jailbreak to fix build with recent blazehtml
cabal-dev: update to Git version to fix build with ghc 7.6.2
haskell-tar: dropped obsolete version 0.3.2.0
haskell-packages.nix: fix path to haskell 'tar' library
haskell-cabal2ghci: add version 0.0.1.0
Calf: upgrade to the final release 0.0.19
Add mda-lv2 audio plugins
linux: Typo: CFG80211_WEXT
games/unvanquished: New nixpkg.
my-env/default.nix: fix "sdl-env" vs "env-sdl" typo

my-env/default.nix lists an example on how to create an SDL environment
that can be installed with "nix-env -i sdl-env". That is actually wrong
and will not work. The correct command is "nix-env -i env-sdl".
Merge pull request #333 from bjornfor/fix-typo

my-env/default.nix: fix "sdl-env" vs "env-sdl" typo
pkgs/build-support/cabal: filter internal 'testDepends' field from the expression to avoid unnecessary hash changes
pkgs/build-support/cabal: filter 'doCheck=false' field from the expression to avoid unnecessary hash changes

In the master branch, doCheck defaults to 'false', which means that no package
will change its hash unless its doCheck field is set to 'true' explicitly. In
the stdenv-updates branch, however, all Haskell packages have a default setting
of 'doCheck=true'. Once that branch has been merged, filtering doCheck is no
longer necessary.