[SSSD] [PATCH] make names nss neutral

[Simo Sorce]

While looking at the previous patch I saw that we were still using the
sss_nss_ prefix for a number of functions that are used by both the pam
and nss responders. Changed the prefix to sss_cli_ so it is more clear
those functions are not nss specific.

Simo.

-- 
Simo Sorce * Red Hat, Inc * New York