Fixed call parking, added separate paramater to allow/disallow call parking on

Zaptel interfaces (canpark=yes/no in zapata.conf), added urlbase paramater to
Monitor so that a url can optionally be included in CDR (user field), cleaned up a couple of minor things


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4413 65c4cc65-6c06-0410-ace0-fbb531ad65f3