* Trap filters a generalized to event filters
 * get_trap_filter RPC message substituted by event_filter
 * event_proxy RPC message
 * All events can be proxied to SAE for further processing
 * EventCollector base class
 * TrapCollector and SyslogCollector are subclasses of EventCollector
 * ERR_UNKNOWN_TRAP_SOURCE renamed to ERR_UNKNOWN_EVENT_SOURCE