broadcast service permission

it'll eventually be a template type too, so add the _TYPE suffix to the var name to make refactoring easier

migrations/versions/0322_broadcast_service_perm.py

@@ -0,0 +1,21 @@
+"""
+
+Revision ID: 0322_broadcast_service_perm
+Revises: 0321_drop_postage_constraints
+Create Date: 2020-06-29 11:14:13.183683
+
+"""
+from alembic import op
+
+
+revision = '0322_broadcast_service_perm'
+down_revision = '0321_drop_postage_constraints'
+
+
+def upgrade():
+    op.execute("INSERT INTO service_permission_types VALUES ('broadcast')")
+
+
+def downgrade():
+    op.execute("DELETE FROM service_permissions WHERE permission = 'broadcast'")
+    op.execute("DELETE FROM service_permission_types WHERE name = 'broadcast'")