fixed disabling of echo canceller
fixed VAZ prepending in case of usage of failover proxy
fixed VAZ prepending in GSM and FXS calls
fixed timeslot allocation for T1E1 module
fixed problem with s2s licence reading for new cards starting with serial number 30
added config option ec_sparse_params
added config option s2s_rtp_passthrough
added config option r2config for setting MFCR2 parameters
added codes for rejecting RTP or T.38, status code can be configured now in the causes map
changed default reject status code from 415 to 488 for T.38
changed default for sip_info_on_facility to 0