to load the module if there is any error

Conflicts:

	libs/freetdm/mod_freetdm/mod_freetdm.c

Conflicts:
	libs/freetdm/src/ftmod/ftmod_sangoma_isdn/ftmod_sangoma_isdn.c

freetdm - ISDN:Fix for not responding to incoming RESTARTs with RESTART ACK if there is an active call on that channel at the time the RESTART was received

make sure dtmfinband gets initialized.
make gk-identifier and gk-interface settings optional (documentation sayed that about gk-identifier already)

FS-3307 --resolve thanks, in the future, be sure to not include vanity comments.  The intention of the patch will be preserved by the jira ticket.  Also check our code formating guidelines.  Some of the patch was redundant so it was removed, mprintf already asserts when it doesn't work, and execute_sql_now both frees the sql string and locks the mutex for you.

add prefix chars to playback_terminators + means include the term in the string and x means include the char and return SWITCH_STATUS_RESTART eg #+* only includes the * if you type it but not the #

Conflicts:
	libs/freetdm/src/ftmod/ftmod_sangoma_isdn/ftmod_sangoma_isdn_support.c

                   - Set the proper RTP payload
		   - Do not validate RTP reads when the size is dynamic (zero)

ftmod_wanpipe.c:
	Remove myerrno variable in wanpipe_read(),
	snprintf does not set errno (according to the manpage),
	so no need to save it (without even using it later).
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>

ftdm_io.c:
	Remove cut_path() function and call since it didn't seem to
	do anything useful anyway.

ftmod_analog.c/ftmod_analog_em.c:
	Remove status variable that was used for the result of codec_func(),
	but was never checked for errors or returned to the caller.

libteletone_generate.c:
	Remove unused variable "var".
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>