Fixed spelling error in comment

git-svn-id: http://svn.code.sf.net/p/mrbs/code/mrbs/trunk@2853 25f7e783-145e-4f2d-a9f8-dd7182bfe9c7
Fixed bug causing triggering spurious policy violations when using periods and $max_duration is set.   See SF Bugs #306

git-svn-id: http://svn.code.sf.net/p/mrbs/code/mrbs/trunk@2854 25f7e783-145e-4f2d-a9f8-dd7182bfe9c7