statuscache

[Ken Murchison]

Looking (again) at integrating this.  Two observations, the first 
somewhat minor, and the second somewhat major:

- statuscache v.2 doesn't have support for HIGHESTMODSEQ.  This is 
trivial to add to a v.3.

- statuscache v.2 stores statuscache_data as a binary blob, which is 
platform dependent (byte-order & word size).  This make statuscache.db 
non-portable.  I believe that this might be the first cyrusdb that would 
be non-portable.  Does anybody care?

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