schema/mysql: delete ranges on time period deletion

schema/mysql-migrations/upgrade_70.sql

@@ -0,0 +1,13 @@
+ALTER TABLE icinga_timeperiod_range
+  DROP FOREIGN KEY icinga_timeperiod_range_timeperiod;
+
+ALTER TABLE icinga_timeperiod_range
+  ADD CONSTRAINT icinga_timeperiod_range_timeperiod
+    FOREIGN KEY timeperiod (timeperiod_id)
+    REFERENCES icinga_timeperiod (id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE;
+
+INSERT INTO director_schema_migration
+  SET migration_time = NOW(),
+      schema_version = 70;

schema/mysql.sql

@@ -1069,5 +1069,5 @@ CREATE TABLE sync_run (
 
 INSERT INTO director_schema_migration
   SET migration_time = NOW(),
-      schema_version = 69
+      schema_version = 70;