FS-9733 [mod_rayo] prevent bad tts format string from being generated when MRCP headers are not present

FS-9412 [switch_loadable_module.c] Make MODULE_UNLOAD event report module name (key) and file (filename), similar to event MODULE_LOAD

Add key and filename for symetry with SWITCH_EVENT_MODULE_LOAD, for api_interface, and to make it simpler to know which module is unloaded

FS-9412 #resolve

FS-9691: don't call sql code inside hash_mutex due to circular mutex contention between hash_mutex and profile->dbh_mutex

FS-9204: complte the urls so that snom can execute the pickup, It used to probably send it to the proxy, but now needs the host in the packet or throws network error

FS-9714: [mod_conference] fix crash due to race on closing file handles when playing a file to a conference via api command as a conference is shutting down

FS-9719: Separate gen_ts_delta between audio and video and enable support to auto engage this feature for pass-thru video

FS-9705 #resolve [Files using prebuffer do not play properly when seeking back to the beginning once the file is done playing]