This reverts commit d2daa44d.

Working on a better fix

mod_voicemail: use vm_email as notification address if vm_notify_email isn't set (that behavior was in voicemail_leave_main but not in deliver_vm)

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

add digit_action_set_target app that can set the target (direction of the dtmf flow and subsequent channel who gets the events) to self or peer (bridged channel when possible)

Tweak link order of some libs to fix build on gcc platforms that have ld flag "--as-needed" as default. Fixes FS-2873 and FS-2874

add xferext command to sendmsg parser so you can send a list of instructions to a channel and build and extension and transfer to it from esl

ftmod_libpri: Always try to close the d-channel to avoid a possible deadlock in case something fails in the I/O module's channel open function.
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>

FreeTDM: Don't ftdm_safe_free() span information in ftdm_span_destroy() if span provides a custom span_destroy callback.

Doing so will cause a NULL-deref segfault while removing the current span from the
global hash (cur_span->name == NULL) in ftdm_global_destroy().

Remove all the ftdm_safe_free() calls in the custom callback part of ftdm_span_destroy() and
let ftdm_global_destroy() handle that.

NOTE: Also adds a missing ftdm_safe_free(cur_span->dtmf_hangup) to ftdm_global_destroy().
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Fix issue where mod_shout does not properly flush buffer on writing mp3 streams, resulting in incomplete files. TODO: Refactor as part of the while loop.

tweak behaviour on rfc2833 a tad for the sake of interop with sonus who can't stand the idea of any gaps in timestamps