MXS-1209: added blr_handle_fake_gtid_list

New routine blr_handle_fake_gtid_list added for fake GTID_LIST_EVENT.

blr_file_append O_APPEND is set only if mariadb10_master_gtid is not
set.

blr_file_append() routine could change name in next commits

server/modules/routing/binlogrouter/blr.c

@@ -695,6 +695,19 @@ createInstance(SERVICE *service, char **options)
         }
     }
 
+    /**
+     * Check mariadb10_compat option before any other mariadb10 option.
+     */
+    if (!inst->mariadb10_compat &&
+        inst->mariadb10_master_gtid)
+    {
+        MXS_ERROR("MariaDB Master GTID registration needs"
+                  " MariaDB compatibilty option."
+                  " Please enable it with option 'mariadb10-compatibility=On'");
+        free_instance(inst);
+        return NULL;
+    }
+
     /**
      * Force GTID slave request handling if GTID Master registration is On
      */