new table for notification blocks

docs/schema.sql

@@ -721,6 +721,14 @@ CREATE TABLE build_notifications (
     email TEXT NOT NULL
 ) WITHOUT OIDS;
 
+CREATE TABLE build_notifications_block (
+    id SERIAL NOT NULL PRIMARY KEY,
+    user_id INTEGER NOT NULL REFERENCES users (id),
+    package_id INTEGER REFERENCES package (id),
+    tag_id INTEGER REFERENCES tag (id)
+) WITHOUT OIDS;
+
+
 GRANT SELECT ON build, package, task, tag,
 tag_listing, tag_config, tag_inheritance, tag_packages,
 rpminfo TO PUBLIC;