normalize tests for outbound channels to use switch_channel_direction instead of testing for CF_OUTBOUND

normalize tests for outbound channels to use switch_channel_direction instead of testing for CF_OUTBOUND

This add support for new SCCP Firmware 9.1

(part of FS-2912)

(part of FS-2912)

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

have mod_sofia always elect to be the session refresher so we know it will work, also make the session-expires set to 0 imply 100% disabled session timers