FS-6271 --resolve Adding support for smoothing the min-cpu-idle by X number of seconds. Adds the cpu-idle-smoothing-depth into the conf/autoload_configs/switch.conf.xml configs with a default value of 30 seconds.

FS-6275 --resolve  I don't think this is a problem with latest firefox + latest master but i'll ensure it with this change.  Anyone into testing webrtc should always use master until an official 1.4 is released.

Can be enabled with 'queue-capacity' param
Cdrs can be pushed to the queue and posted in a separate
thread to avoid bllocking the session with a slow web server

This reverts commit fa921711.

FS-5412 --resolve use getlib to build radius client and stop statically defining path to freeradius-client.so

Thanks Sven Neuhaus <neuhaus@tyntec.com>