[PATCH] In case of no stdin tty, wrong silent level can be set

Note: filed on behalf of maartenvanraes / alien.

If you execute silent=1 query in mysql, from a tty or some kind of automated script, the output will be different, because silent will then be 2 instead of 1. This will have the effect of removing column names.

I postponed the decision for being silent when not using a tty AFTER processing the options, the output of the scripts will be the same, except if you don't add a -s flag, in which case (for historical relevance) it will become silent after all...

Patch: https://github.com/MariaDB/server/pull/82