(find_database): If unprocessed wildcard database is

(find_database): If unprocessed wildcard database is
found, register database filed and recursively call find_database.
(free_db_info): Unref db_info->properties.
(register_database): New arg properties.  Delete code for
initializing mdatabase__list.
(register_databases_in_files): Argument changed.  Caller changed.
(mdatabase__update): Don't list files by glob here.
(mdatabase_list): If unprocessed wildcard database is found,
register database filed and recursively call mdatabase_list.