#11148: skip dumping information|performance_schema in mysql handler

Hey,

i stumbled upon another problem

The 'INFORMATION_SCHEMA.GLOBAL_STATUS' feature is disabled; see the documentation for 'show_compatibility_56' (3167)

and I guess its related to #11148 (closed). So I only integrated the patch from #11148 (closed) to this PR.

Some of the systems I manage are affected so my interest has suddenly grown ;)

I didn't test this changeset but started with a code review:

• The proposed branch makes unrelated whitespace changes. If they are needed, please make them in a separate commit; if they are not needed, please drop them.
• The change to the debug line seems to have wrong quoting: I think the added single quotes in the debug string should be escaped, no?
• I'd prefer if the added grep regexps used -E (i.e. something closer to what most programming languages use).

assigned to @louis

mentioned in merge request !5 (merged)

!5 (merged) improves on top of this MR, closing.

closed