MFC:	sys/kern/kern_descrip.c	1.295
MFC:	sys/kern/kern_descrip.c	1.295

Compress direct cr_ruid comparsion and jailed() call to suser_cred(9).

Reviewed by:	rwatson

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