freetdm: core - moved validation of sigstatus from implementation to core, on sigstatus getters/setters
         core - locking the channel on ftdm_channel_get_sig_status() and ftdm_channel_set_sig_status(),
                but not on ftdm_span_get_sig_status() nor ftdm_span_set_sig_status()
         ftmod_r2 - locking channels on ftdm_r2_get_span_sig_status() and ftdm_r2_set_span_sig_status()

freetdm: ftmod_r2 - updated ftdm_r2_set_channel_sig_status() to notify the user of signaling changes
                    just when specified on docs/sigstatus.txt.
					also updated ftdm_r2_set_span_sig_status(), so that it uses the former to set channels
                    status, instead of doing it directly.

freetdm: ftmod_r2 - notify the core when we change the signaling status of a channel or span through the api

         mod_freetdm - created sigstatus api command

freetdm: ftmod_wanpipe - now receiving ftdm macros for channel polling, instead of using POLLPRI, etc., directly
         ftmod_r2 - also using ftdm macros for polling

Do not set nat mode when the device's network_ip is within the acl also so if your FS is behind nat and your phone is too then it will still make the right decisions

skypopen: tweaking the OSS audio driver, still gives a load average higher than snd-dummy + snd-pcm-oss on CentOS 5 (but not much more, and lower cpu load), but now is very very good on tickless kernels, eg: Ubuntu 10.04 LTS