Use the new parameter immediate-forwarding-numbers to configure
immediate forwarding logic that emulates hunt groups
The parameter syntax is:
[<span-name>:]<number>
Multiple elements can be specified separated by commas
If the <span-name> is specified, the span will be checked for
availability, if available, its number will be selected for
forwarding, otherwise next number will be checked
Forwarding is enabled as soon as a channel is answered and its
disabled when the channel is hung up
Added new channel command FTDM_COMMAND_SET_POLARITY
ftmod_wanpipe - Added support to enqueue polarity events on FXO lines
ftmod_wanpipe - Added support to set polarity on FXS lines
ftmod_analog - Added support to answer and hangup FXO lines on polarity reverse
ftmod_analog - Added support to reverse polarity in the FXS line on answer and hangup
mod_freetdm - Added parameters answer-on-polarity, hangup-on-polarity and polarity-delay
to enable those analog features