Comment 8 for bug 530456

OK, I've changed this so if the value is undefined, the following prints out:

label: There is a problem. The expression "EXPR" did not evaluate properly. You may need to fix this line in the config file

For example, the variable table_cache was changed to table_open_cache in MySQL 5.1. If I use a config file that uses table_cache against 5.1, here's what I get:

table cache size: There is a problem. The expression "table_cache.>-1" did not evaluate properly. You may need to fix this line in the config file

Will release in version 18, should appear momentarily on the site.