Update osf1_setuid() and osf1_setgid() to use the new change_euid() and change_ruid() in kern_prot.c.  This fixes an incorrect use of chgproccnt().
Update osf1_setuid() and osf1_setgid() to use the new change_euid() and
change_ruid() in kern_prot.c.  This fixes an incorrect use
of chgproccnt().

Update both osf1_setuid() and osf1_setgid() to use setsugid() instead
of just frobbing the flag.

(mostly) submitted by: truckman

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase