[IcculusNews] Offset digests, &c.

[Ryan C. Gordon]

> Version 1.9 of net.c in the CVS tree fixes INEWS_digest() to work with
> the new-world protocol (I might hack up an autodetect for old-world),
> and adds (hopefully) working client-side digest caching.  cvs up it
> today!

I wouldn't bother with an autodetect; we control all known IcculusNews
daemons and clients.  :)

After I update php_interface and make sure all related sites are using it,
I'll kill the dual daemons and put the new code into effect on port 263.

--ryan.