Removed confnotify-6.0.patch.

I don't think it is a good idea to hardcode this patch in nixpkgs as it is likely that
a patch provided by a user will conflict with this patch. This is for instance the case
with the patch "single_tagset" (http://dwm.suckless.org/patches/single_tagset).
Updating toxic and toxcore to newer code.
lxc: update from 1.0.0.beta4 to 1.0.0
duplicity: update from 0.6.22 to 0.6.23
spamassassin: update from 3.3.2 to 3.4.0
Add mariadb
acpid: update from 2.0.20 to 2.0.21
isocodes: update from 3.49 to 3.51
iw: update from 3.11 to 3.14
libmilter: update from 8.14.4 to 8.14.8
libpcap: update from 1.4.0 to 1.5.3
libselinux: update from 2.2.1 to 2.2.2
libzip: update from 0.11.1 to 0.11.2
links2: update from 2.5 to 2.8
memtest86: update from 4.1.0 to 4.3.3
mtools: update from 4.0.17 to 4.0.18
nasm: update from 2.10 to 2.11.01
nspr: update from 4.10.2 to 4.10.3
pylint: update from 0.26.0 to 0.28.0
python-logilab-astng: update to version 0.24.3