Use namespaces for NetVar type pointers.

Enums defined in bifs and records declared in bifs are now available
in the C++ layer in namespaces (before they were in the global namespace
with enum_* and rectype_* prefixes).

Namespaces are now BroTypePtr::Enum::<name-of-enum> and
BroTypePtr::Record::<name-of-record>

src/Portmap.cc

@@ -288,7 +288,7 @@ void PortmapperInterp::Event(EventHandlerPtr f, Val* request, int status, Val* r
 		}
 	else
 		{
-		vl->append(new EnumVal(status, enum_rpc_status));
+		vl->append(new EnumVal(status, BroTypePtr::Enum::rpc_status));
 		if ( request )
 			vl->append(request);
 		}