Merged latest FreeTDM code from Sangoma's repo

Merged latest FreeTDM code from Sangoma's repo
Merge remote branch 'smgfs/master'

Conflicts:
	build/modules.conf.in
	configure.in
	libs/esl/fs_cli.c
	libs/freetdm/mod_freetdm/mod_freetdm.c
	libs/freetdm/src/ftmod/ftmod_sangoma_isdn/ftmod_sangoma_isdn.h
	libs/freetdm/src/ftmod/ftmod_sangoma_isdn/ftmod_sangoma_isdn_cfg.c
	libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_logger.c
	libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_support.c
	src/include/switch_types.h
	src/mod/applications/mod_commands/mod_commands.c
	src/mod/applications/mod_spandsp/mod_spandsp.c
	src/mod/endpoints/mod_opal/mod_opal.cpp
	src/mod/endpoints/mod_opal/mod_opal.h
	src/mod/endpoints/mod_sofia/mod_sofia.h
	src/mod/endpoints/mod_sofia/rtp.c
	src/switch.c
	src/switch_core.c
	src/switch_rtp.c