deleted DELETE

[Ken Murchison]

I just committed Bron's modified version of David's delayed delete 
patch, with a few small mods of my own.  The only externally visible 
change is I renamed "deleteprefix" to "deletedprefix".  I also 
removed/modified some of the option caching code.

--
Kenneth Murchison
Systems Programmer
Project Cyrus Developer/Maintainer
Carnegie Mellon University