Change capabilities to uint64_t

- Since the capabilities are a bitmask, it is better if an unsigned
  integral type is used.
- Since the function is part of an ABI, it is better if an explicit
  size is used.
- 64-bits so that there also is room for independent filter
  capabilities.

server/modules/routing/readconnroute/readconnection.h

@@ -59,7 +59,6 @@ typedef struct router_client_session
     DCB *backend_dcb; /*< DCB Connection to the backend      */
     DCB *client_dcb; /**< Client DCB */
     struct router_client_session *next;
-    int rses_capabilities; /*< input type, for example */
 #if defined(SS_DEBUG)
     skygw_chk_t rses_chk_tail;
 #endif

server/modules/routing/readconnroute/readconnroute.c

@@ -111,7 +111,7 @@ static void clientReply(ROUTER *instance, void *router_session, GWBUF *queue,
                         DCB *backend_dcb);
 static void handleError(ROUTER *instance, void *router_session, GWBUF *errbuf,
                         DCB *problem_dcb, error_action_t action, bool *succp);
-static int getCapabilities();
+static uint64_t getCapabilities();
 
 
 /** The module object definition */
@@ -561,8 +561,6 @@ newSession(ROUTER *instance, SESSION *session)
         }
     }
 
-    client_rses->rses_capabilities = RCAP_TYPE_PACKET_INPUT;
-
     /*
      * We now have the server with the least connections.
      * Bump the connection count for this server
@@ -987,7 +985,7 @@ static void rses_end_locked_router_action(ROUTER_CLIENT_SES* rses)
     spinlock_release(&rses->rses_lock);
 }
 
-static int getCapabilities()
+static uint64_t getCapabilities()
 {
     return RCAP_TYPE_PACKET_INPUT;
 }