ports/178074: dns/knot: update to 1.2.0

[erwin at FreeBSD.org]

Synopsis: dns/knot: update to 1.2.0

Responsible-Changed-From-To: freebsd-ports-bugs->erwin
Responsible-Changed-By: erwin
Responsible-Changed-When: Tue Apr 23 07:57:38 UTC 2013
Responsible-Changed-Why: 
My PR.

http://www.freebsd.org/cgi/query-pr.cgi?pr=178074