- 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
- Added locking documentation (docs/locking.txt)
- Updated core state advance to use state processor in span
rather than pushing the processor in the function arguments