Unregisters the specified (or all) outbound registration(s) and stops future registration attempts. Call PJSIPRegister to start registration and schedule re-registrations according to configuration.
ActionID- ActionID for this transaction. Will be returned.
Registration- The outbound registration to unregister or '*all' to unregister them all.
This documentation was imported from Asterisk Version GIT-master14-7d171644349eda