core: Allow colon separated tokens in event_route names

- Event routes can have named routes following the format:
-- <module>:<event>:<name>
-

cfg.lex

@@ -556,7 +556,7 @@ COLON		":"
 STAR		\*
 DOT			\.
 CR			\n
-EVENT_RT_NAME [a-zA-Z][0-9a-zA-Z-]*":"[a-zA-Z][0-9a-zA-Z-]*
+EVENT_RT_NAME [a-zA-Z][0-9a-zA-Z-]*(":"[a-zA-Z][0-9a-zA-Z-]*)+
 
 
 COM_LINE	#