These changes fix 10145 and 10150, a prob with BSD and exp2/log2 not existing, as well as the bootstrap needing a small upgrade for openbsd. Many thanks to mvanbaak

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@73821 65c4cc65-6c06-0410-ace0-fbb531ad65f3