mysql: fix install into DESTDIR

this is a regression from the version bump, now it needs a different
syntax to make mysql respect DESTDIR.
mysql: build without 180 MB of tests
mysql: bump to 5.6.13
README: update the contributing section
dwm: debloat
add znc (provided by n0v)
Add a patch to prevent gcc3 from removing /dev/null!

gcc 3.4.6 was removing /dev/null while building musl in stage 0.
I tracked down the bug, along with a patch to fix it.
Thanks to Gentoo and Mike Frysinger for the patch.
Merge pull request #108 from CMB/devnull

Ensure that gcc 3.4.6 doesn't remove /dev/null.
sylpheed: gtk+2 mail client
dillo: updated to 3.0.3
netsurf: updated to 3.0
netsurf: remove dependency on gperf
add shuffle (provided by n0v)
git: updated to 1.8.3.4
git: updated to 1.8.4
Pull a patch from kernel git to unbreak dropbear.

Dropbear hangs while reading /proc/timer_list for entropy.  Fixed with
this patch, which should be available in 3.11.
The commit ID from the kernel git repo is:
84a78a6504f5c5394a8e558702e5b54131f01d14
Merge pull request #110 from CMB/timerlist

Pull a patch from kernel git to unbreak dropbear.
st: one more time...
dvtm: once again
dtach: for rofl0r