* don't use 1-8 numbers for open_table_error codes, use an enum.

* print "table doesn't exist in engine" when a table doesn't exist in the engine,
  instead of "file not found" (if no file was involved)
* print a complete filename that cannot be found ('t1.MYI', not 't1')
* it's not an error for a DROP if a table doesn't exist in the engine (or some table
  files cannot be found) - if the DROP succeeded regardless

mysql-test/r/mysql_client_test_nonblock.result

@@ -1,5 +1,6 @@
 SET @old_general_log= @@global.general_log;
 SET @old_slow_query_log= @@global.slow_query_log;
+call mtr.add_suppression(" Error reading file './client_test_db/test_frm_bug.frm'");
 ok
 SET @@global.general_log= @old_general_log;
 SET @@global.slow_query_log= @old_slow_query_log;