hint zones and reject them. [RT #35268]
Squashed commit of the following:
commit 5b0254711d6b77940d6217b9131b9d401df8a866
Author: Mukund Sivaraman <muks@isc.org>
Date: Fri Mar 28 02:09:01 2014 +0530
Remove redundant helper function
commit a4341c1a2ba830c8cee1def57a533f987f67c3dc
Author: Mark Andrews <marka@isc.org>
Date: Thu Jan 30 10:08:17 2014 +1100
error out if masterfile-format raw is specified for a hint zone.
