Make clear that runids are not cluster node IDs.

src/replication.c

@@ -343,7 +343,7 @@ int masterTryPartialResynchronization(redisClient *c) {
         /* Run id "?" is used by slaves that want to force a full resync. */
         if (master_runid[0] != '?') {
             redisLog(REDIS_NOTICE,"Partial resynchronization not accepted: "
-                "Runid mismatch (Client asked for '%s', I'm '%s')",
+                "Runid mismatch (Client asked for runid '%s', my runid is '%s')",
                 master_runid, server.runid);
         } else {
             redisLog(REDIS_NOTICE,"Full resync requested by slave.");