move random backend to modules
add default for SOA contact e-mail
add supplementary groups support
Move soa-calculation to seperate function.

Conflicts:

	pdns/serialtweaker.cc
Add increase-serial to pdnssec
Only change soa.serial when SOA-EDIT is set.
initial rough implementation of *reverse* DNS64. Inspired by Terry Froy & a pint of #ripe66 guinness
This fakes up the proper PTR records too.
add DNS64 documentation, plus dns64 sample script to the tree
NSECx optimizations
tiny tweaks to documentation
add DNS64 documentation, plus dns64 sample script to the tree
tiny tweaks to documentation
drop unused ignore-rd-bit flag
Merge pull request #810 from mind04/suppgroups

add supplementary groups support
Merge pull request #812 from cmouse/config-include-support

Config include support
Merge branch 'modules' of github.com:mind04/pdns into mind04-modules

Conflicts:
	.travis.yml
drop random backend from gmysql test
Revert "drop random backend from gmysql test"

This reverts commit 9f478ee6b796c791e83869523425b5215360943e.
add include-dir to pdns.conf-dist
more verbose apt-get in travis to avoid potential timeouts