New PV Class: $sel(name)

There is a new pseudo-variable class that provides access to select variables. A list with available selects can be found at:

http://sip-router.org/wiki/cookbooks/selects/devel

Therefore, all modules relying on PV framework can get access to select values without any change. See example of usage from config at:

http://sip-router.org/wiki/cookbooks/pseudo-variables/devel#selects