Merge pull request #130 from Ypnose/master

mksh: update to R48b
isl: update to 0.12.1.
enlightenment: fix #131 (Enlightenment is not listed in GDM/KDM).
iptables: update to 1.4.20.
iptables: drop obsolete conf_file.
libbsd: update to 0.6.0.
xbps-git: bump version.
New package: ranger (close #137).
luafilesystem: update to 1.6.2.
New package: luakit-2012.09.13.r1 (close #136).
yajl: update to 2.0.4.
yajl: fix cross build.
New package: mpd-0.17.5 (close #132).
mpc: renamed to libmpc and update to 1.0.1 (soname bump).
gcc: rebuild against libmpc-1.0.1.
libmpc: fix -devel depends.
gcc: use a working libmpc pkg.
libmpc: replace old mpc pkgs.
New package: libmpdclient-0.28.
New package: mpc-0.23 (close #133).