FreeSWITCH

Merge pull request #38 in FS/freeswitch from ~ALEXDG/freeswitch-event-for-gateway-ping:master to master

* commit '388e9638de7c14e00272777245dacc87cf09fc1c':
  F-5946 add the patches. if in the sofia gateway config the param pin-monitoring is true, then every ping result raise an sofia::gateway-state event