Create temporary pg.auto.conf file with the same permissions as the original

Commit 0574279 set the file permissions to 0600 rather than the user's
umask, but if initdb was executed with -g/--allow-group-access, the
file is maintained with 0640, so we'll just maintain the existing
permssions.

dbutils.c

@@ -1165,7 +1165,6 @@ _get_pg_setting(PGconn *conn, const char *setting, char *str_output, bool *bool_
 				/*
 				 * Note we assume the caller is sure this is a boolean parameter
 				 */
-				printf("YYY %s\n", PQgetvalue(res, i, 1));
 				if (strncmp(PQgetvalue(res, i, 1), "on", MAXLEN) == 0)
 					*bool_output = true;
 				else