[horde] large session entries in horde_sessionhandler

[liam hoekenga]

> No.  By default, IMP *doesn't* store the body contents in the session
> for the very reason it has the possibility of creating extremely large
> sessions.  This new config item is designed for those of us running IMP
> on small systems with minimal users to take advantage of caching the
> bodytext also.

It seems to be doing it by default w/ IMP 4.0.3.  If it is system 
configurable,
what do we change to turn it off?

Liam