FS-3882, FS-3546, FS-3712, FS-3970: --resolve Fixes the segfault in mod_rtmp where the channel was destroyed, but the endpoint still tried to send or receive data from the session.

FS-4867: --resolve Prevent possible deadlock due to mutexes locked in opposite order between switch_ivr_dmachine_ping and switch_channel_queue_dtmf

Commit f913670e changed switch_core_session_sprintf() args
from sip->sip_to to sip->sip_from, but didn't update the enclosing if()
clause protecting the code from dereferencing NULL pointers.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

FS-3743 --comment-only I've added the variable playback_timeout_as_success so you can make it return success even if it timed out.

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

Add support for "q921_all"/"q931_all" to parse_debug() ("debug" span parameter), taken from
ftmod_libpri.

Passive libpri's raw dump feature is broken (e.g. I-frames missing), so
add "q921_raw" hexdump support to the pritap I/O read/write function.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

AM_CONFIG_HEADER is deprecated in automake 1.13.1 (and temporarily not available in 1.13),
the replacement is available in autoconf-2.59 (and maybe before).

NOTE: Remove sed hackery when upstream has released a fixed version
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>