add more checking on valid module interface/implementation structs.  Don't push null descriptions, syntax, ect into the events (and eventually into the db).  More properly handle const qualifers.  Push blank instead to avoid a printf of null.  Breaking change (although not to any in tree codecs) is if you have any implementations with a blank iananame, the entire codec interface will no longer load.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4373 d0543943-73ff-0310-b7d9-9358b9ac24b2