Fix array key name. Fix setting flag changes.
This hasn't been used since Horde 4
Fix variable name
Avoid warnings about modifying an overloaded property.
Only log ActiveSync entries if we active the synclog.

Information provided by the activesync logger is really only
useful if separated into device files, and is only useless
noise if dumped into the horde-wide log file.
Can't use overloaded properties in current() either.
Ensure mimesupport is always set.