Makefile: Added krb5 option from Nathan Neulinger <nneul@umr.edu>

Makefile: Added krb5 option from Nathan Neulinger  <nneul@umr.edu>
includes.h:	Added krb5 option from Nathan Neulinger  <nneul@umr.edu>, added SGI5 fix.
password.c: Added krb5 option from Nathan Neulinger  <nneul@umr.edu>
quotas.c: Added inode quote fix.
reply.c: removed redundent code.
server.c: Changed error debug to 0, removed redundent check.
util.c: Added close_low_fd() to become_daemon - fix for rsh from Johnathan Knight.
Jeremy (jallison@whistle.com)
(This used to be commit 256afb764828b0a6dad5529d62501bc9ea2807ee)