Verify spf PTR records.

Reported by:	@citrin
Properly set address for PTR components.
Revert ucl resynchronization.

Reported by:	@citrin
Fix upstreams interaction for fuzzy_check.
Remove /0 mask for SPF mx as well.

Reported by:	@citrin
Merge pull request #111 from citrin/master

Remove nszones.com fake RBL
Remove CBL as it's wholly included in Spamhaus XBL which we're querying already - http://cbl.abuseat.org/faq.html
Merge pull request #112 from fatalbanana/master

Remove CBL as it's wholly included in Spamhaus XBL
Update readme.
Rework API completely.
Start new upstreams implementation.
Split addr definition from the utils code.
Rework host/port/priority parsing.
Add some basic logic for upstreams.
Allow multiple addresses per upstream.
Upstreams get implementation.
Fix lua upstream code.
Merge branch 'upstream-rework'
Disable binlog configuration as it is anyway broken.
Fix some more old upstreams code.