Add schema change file for is_guest flag

synapse/storage/schema/delta/28/users_is_guest.sql

@@ -0,0 +1,22 @@
+/* Copyright 2016 OpenMarket Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ALTER TABLE users ADD is_guest admin SMALLINT DEFAULT 0 NOT NULL;
+/*
+ * NB: any guest users created between 27 and 28 will be incorrectly
+ * marked as not guests: we don't bother to fill these in correctly
+ * because guest access is not really complete in 27 anyway so it's
+ * very unlikley there will be any guest users created.
+ */