Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>

Fixes:
- Fix double locking in check_state(): remove ftdm_mutex_(un)lock calls.

New:
- Add lpwrap_init_bri() to initialize libpri in BRI mode
- Use trunk type to determine PRI/BRI and PTP/PTMP mode (no additional configuration required).
- Improve libpri detection code in configure.ac, check whether libpri is usable
  and if BRI support is available (needs more work)

Cleanups:
- Whitespace and indentation cleanups
- Rename str2* functions to parse_*
- Simplify libpri_configure_span() option parsing and bail out on error
- Add "ftdm libpri help" command that displays usage information
- Coding style cleanups and other (minor) changes

Known issues:
- BRI PTMP TE Q.921 link does not go beyond TEI ASSIGNED state,
  SABME requests are ignored by NT (EuroISDN DTAG, DAHDI-2.3.0.1, vzaphfc)
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>

FreeTDM: Update .gitignore, add files shipped with libtool (build/{libtool,lt*}.m4) and compiled test binaries

channels;
- Updated documentation.

set minimum initital sip t1 timer to 1000ms to work around race condition on retry timer firing before all the things that are supposed to be handled by the timer are set.  The base resolution on this timer is 500ms, so doubling up makes sure we always hit the initial retry timer on the next run, where everything should be set.  The side effect was, 1/2 the time on a request that did not get immediate response, the timer would be fired and cleared, but the action (sending retry) was never done, and a new timer was not set, causing the request to just sit zombied and never retry.  A better solution would be to find and correct the race condition so the timer is never set to early and we never hit this condition.

add support for NDLB-force-rport=safe param that does force-rport behavior only on endpoints we know are safe to do so on.  This is a dirty hack to try to work with certain endpoints behind sonicwall which does not use the same port when it does nat, when the devices do not support rport, while not breaking devices that acutally use different ports that force-rport will break

skypopen: performance improvements in skypopen_protocol.c and alsa/dummy.c . Added pcm*c to alsa/. Let's hope the larger period in dummy.c does not make problems on ubuntu

skypopen: nice formatted debug output (I feel so stupid when I use one full hour for things like this, but I like it ;) )

skypopen: modifying Makefile.am and skypopen.h to report in revision tag of debug lines the last commit of both mod_skypopen.c and skypopen_protocol.c (so you can have your own commits in the same dir)