inn 2.3 cnfs.c patch to 2.2.1

[Nicholas Geovanis]

For the record -
At Russ Alberry's suggestion I eyeballed Kehoe's msync() patch to cnfs.c
for HPUX 10.X (10.20 in my case) and INN 2.3 into INN 2.2.1. So far it
works just fine, cycbuff headers get updated, etc. I ignored the patches
to the other two modules. Thanks.

+-------------------->
| Nick Geovanis
| IT Computing Svcs
| Northwestern Univ
V n-geovanis at nwu.edu