[PATCH] nsswitch extensions + caching daemon

Hello!
I've made the "nsswitch + caching daemon" project during the Google's
Summer of Code. There were some issues, though, in the first release of
the project.
Here is the second version of the patch:
http://www.rsu.ru/~bushman/nsswitch_cached/nss_cached.patch

It contains several new features, which were not included in the first
release (like negative caching, nscd-like functionality support, new
cached.conf file syntax). Besides, a lot of code style improvements were
made to match the style(9) rules. The description of the project itself
and its new features can be found here:
http://rsu.ru/~bushman/nsswitch_cached/

Please test the patch and send me your feedback. It would be just great
if it could be included to the HEAD. If it's not possible right now,
I'll continue working on it to fix all the issues, so that it could be
finally merged into the FreeBSD source tree.

With best regards,
Michael Bushkov
Rostov State University