[imp] default from address (maybe ['hooks']['from'])

[Liam Hoekenga]

Quoting Jan Schneider <jan@horde.org>:

> PHP of course. ;-)
> 
> Not kidding, you should really use PHP because you simply use the 
> unserialize function on the stored identities to see who didn't customize 
> his identity and set it correctly in the same step.

So add something to IMP to do this, or come up with an external utility?

I really wish this had concern had been voiced by our test group (also our help 
desk incidentally.) :\

Liam