NSS_POSTGRESQL

This library provide the capability to have all classical 
users definitions in a PostgreSQL server instead than in the
old plain text files in /etc passwd,group,shadow.

All is done without any trick or something like, simply 
connecting to the nss (name servica switch) facility 
offered by the libc (2.x) as nis and nisplus already did.

All without recompiling or touching any application 
configurations. Just compile and install nss_postgresql 
library and set up a PostgreSQL server.