Better inno d bupdate

Moved the innoDB update stuff out of the version section into it's own area, so that everytime zmupdate.pl runs it checks for MyISAM tables and offers to update them.

If someone didn't do that on the upgrade to 1.26.whatever then it would never ask them again.  

Also just removed some unneccessary stuff, and instead of doing multiple connects/disconnects, it just connects at the beginning and stays connected.