mention RLIMIT_RSS is borked.

lib/libc/sys/getrlimit.2

@@ -1,4 +1,4 @@
-.\"	$NetBSD: getrlimit.2,v 1.32 2009/07/01 11:25:50 wiz Exp $
+.\"	$NetBSD: getrlimit.2,v 1.33 2011/11/15 22:45:26 christos Exp $
 .\"
 .\" Copyright (c) 1980, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"     @(#)getrlimit.2	8.1 (Berkeley) 6/4/93
 .\"
-.Dd July 1, 2009
+.Dd November 15, 2011
 .Dt GETRLIMIT 2
 .Os
 .Sh NAME
@@ -230,3 +230,9 @@ The
 .Fn getrlimit
 function call appeared in
 .Bx 4.2 .
+.Sh BUGS
+The resource limit
+.Dv RLIMIT_RSS
+is not implemented in 
+.Xr uvm 9 
+which means that process memory size limits are not enforced.