Remove email 'match' setting deprecated since 1.2.0.
Remove base output type, tags, and exclude_tags setting deprecated since
1.2.1
Remove stdout debug_format and message settings that were deprecated in
1.2.1.

Also mark 'debug' deprecated.
output? always returns true now that type/tags/etc are gone.
filter? always returns true now that type/tags/etc are gone.
Deprecate stdout 'debug' setting