fix description; PR misc/3077.

also added xref to sysctl(3), which may be preferable.

lib/libkvm/kvm_getloadavg.3

@@ -1,4 +1,4 @@
-.\"	$NetBSD: kvm_getloadavg.3,v 1.2 1996/03/18 22:33:26 thorpej Exp $
+.\"	$NetBSD: kvm_getloadavg.3,v 1.3 1997/01/03 06:36:55 mikel Exp $
 .\"
 .\" Copyright (c) 1992, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -38,7 +38,7 @@
 .Os
 .Sh NAME
 .Nm kvm_getloadavg
-.Nd get error message on kvm descriptor
+.Nd get system load averages
 .Sh SYNOPSIS
 .Fd #include <sys/resource.h>
 .Fd #include <kvm.h>
@@ -64,4 +64,5 @@ the number of samples actually retrieved is returned.
 .Sh SEE ALSO
 .Xr uptime 1 ,
 .Xr kvm 3 ,
+.Xr sysctl 3 ,
 .Xr getloadavg 3