- fixed bug in configure.ac to detect ftmod_pritap compilation
- ignore FTDM_SIGEVENT_RELEASED and FTDM_SIGEVENT_INDICATION_COMPLETED in mod_freetdm
- Destroy the state completed interrupt on channel destroy
- Fix analog polarity reversal bug when using 3-way calling or call-swap
* Replace ftdm_channel_flag_t with defines. We reached the 32bit limit where does not seem reliable
to keep using enum.
* Flags member for ftdm_channel_t is now uint64_t
* Added FTDM_CHANNEL_CALL_STARTED flag to indicate when the API user knows about a call
* Refactored raw_data member for ftdm_sigmsg_t. If raw_data needs to be freed it must be requested explicitly
through the autofree member
* Added collected member to ftdm_sigmsg_t for FTDM_SIGEVENT_COLLECTED data instead of using raw_data
* Created define FTDM_DIGITS_LIMIT for DNIS/ANI digits limit
* Fix some stat checks and outdated code in ftmod_analog
* Refactored ftdm_channel_get_history_str API to return the time offsets and time since last state change
* Do not send FTDM_SIGEVENT_STOP and FTDM_SIGEVENT_RELEASED on calls that were never reported to the user
