freetdm: - Added ftdm_usage command to check if a channel has calls (ie, is busy)
         - Refactored ftdm CLI management to allow standalone APIs to be registered
         - Minor logging changes here and there
update changelog  Thanks to Niek Vlessert for assisting with this
Chnaged T.30 x-rex, y-res, width vetting to be more rigorous.
Various little tweaks to spandsp
FS-5160 --resolve This is depricated in favor of {loops=10}tone_stream://path=/foo/bar.ttml adding legacy code to let both ways work
required trivial fix for windows for last spandsp commit
spandsp trivial compiler warning - oops better do this instead
FS-5156 --resolve default configuration needs new dsn
Spandspi's FAX engine now gives separate size and resolution information about
the images on the line and the images in the file. The ties in with the recent
addition of image resizing and flattenign for colur images.
mod_spandsp has been changed to make use of the additional information.
FS-4000 --resolve
FS-3996 --resolve stop conference recording when only 1 person left
FS-4225
FS-5163 --resolve
FS-5087 --resolve
Improve instructions for Debian util.sh build

These instructions comprise everything needed to build the Debian
packages from a virgin Debian image.
update to be recorded phrases
Allow logging of detailed verbose per UUID for debugging
Merge branch 'master' of https://github.com/FreeSWITCH/FreeSWITCH