- Manually merging latest code from gideon.gsm branch after review/inspection/modifications

freetdm: refactor ftmod_gsm.c code to use proper core functions and interrupts to wait for io and state changes

         - Add definition of FTDM_MAX_SIG_PARAMETERS to have a standard limit for signaling module parameters

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

fix race condition where network lists are not created yet so nat detection does not work in sofia during startup

set session loglevel as well in fs_cli when doing 'console loglevel info' also now implies '/log info' locally

Thanks to Phil Zimmermann for the code and for the license exception
we needed to include it.

There remains some build system integration work to be done before
this code will build properly in the FreeSWITCH tree.

More build system work may be needed.

Thanks to Travis Cross for much of the language here.
Signed-off-by: Philip Zimmermann <prz@mit.edu>
Signed-off-by: Travis Cross <tc@traviscross.com>

Thanks to Travis Cross for much of the language here.
Signed-off-by: Philip Zimmermann <prz@mit.edu>
Signed-off-by: Travis Cross <tc@traviscross.com>

(refs #25)

(refs #24)

(refs #25)

(closes #26)

(closes #23)

(closes #22)

ZRTP_SRTP_HASH_SHA1 was moved from public zrtp_hash_id_t to the
private srtp implementation. HMAC SHA1 constant was also renamed to
ZRTP_SRTP_HASH_HMAC_SHA1 in order to raise an error if the user tries
to use an old ZRTP_SRTP_HASH_SHA1 constant in a ZRTP session
configuration.