[horde] share sql driver and bitwise operations

[Andrew Morgan]

On Sun, 21 Sep 2008, Andrew Morgan wrote:

> I'll start working on this problem, following the discussion on 
> http://bugs.horde.org/ticket/7363 for guidance.  I need to fix this by the 
> end of the week and the student horde returns!

Well, the students arrived early and melted down our MySQL server.  I have 
reverted back to the standard Datatree in our production webmail, which is 
working fine now.

 	Andy