Add getCapabilities to filters

Common capabilities are now defined in routing.h. The common
capabilities can be defined using bits 0 - 15.

Router capabilities are defined using bits 16-31 and filter
capabilities (should there ever be such) using bits 32-47.

So, to find out the capabilities of a service you only need to
OR the capabilities of the router and all filters together.

For instance, if a single filter needs statement based routing,
then that is what is done.

server/modules/routing/readconnroute/readconnroute.c

@@ -987,7 +987,7 @@ static void rses_end_locked_router_action(ROUTER_CLIENT_SES* rses)
 
 static uint64_t getCapabilities()
 {
-    return RCAP_TYPE_PACKET_INPUT;
+    return RCAP_TYPE_NONE;
 }
 
 /********************************