Add stablerestart(5) to the See Also list for nfsd.8.

This is a content change.

Suggested by:	Jeremy Chadwick
MFC after:	2 weeks

usr.sbin/nfsd/nfsd.8

@@ -28,7 +28,7 @@
 .\"	@(#)nfsd.8	8.4 (Berkeley) 3/29/95
 .\" $FreeBSD$
 .\"
-.Dd March 29, 1995
+.Dd April 19, 2011
 .Dt NFSD 8
 .Os
 .Sh NAME
@@ -195,6 +195,7 @@ just do a
 .Xr nfssvc 2 ,
 .Xr nfsv4 4 ,
 .Xr exports 5 ,
+.Xr stablerestart 5 ,
 .Xr gssd 8 ,
 .Xr ipfw 8 ,
 .Xr mountd 8 ,