This is a patch for current_database working on ALTER ROLE/GRANT/REVOKE statements which should be applied after the previous patch "comment_on_current_database_no_pgdump_v4.4.patch".
By using the patch the CURRENT_DATABASE can working in the following SQL statements:
ALTER ROLE ... IN DATABASE CURRENT_DATABASE SET/RESET configuration_parameter
GRANT ... ON DATABASE CURRENT_DATABASE TO role_specification ...