deliver events with the core thread pool set events-use-dispatch=true in switch.conf.xml to use the old way

decoder encounters certain kinds of messed up T.85 images.

squashing.

FS-4757 this should fix it but I am not happy with the way this is done but since polycom is one of the only phones that does this right I have no other choice

FS-2731 significantly reworked version of Emmanuel's patch to allow subscribing and notifying for the as-feature-event events.  we still need a module to handle the FS events for this automatically... coming soon to a repository near you