print a warning that realpath points to internal static storage space that

will be overwritten by subsequent calls; suggested by pjanzen, ok millert

src/lib/libutil/opendev.3

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: opendev.3,v 1.10 2000/05/01 06:05:33 hugh Exp $
+.\"	$OpenBSD: opendev.3,v 1.11 2002/02/25 22:19:45 pvalchev Exp $
 .\"
 .\" Copyright (c) 2000, Todd C. Miller.  All rights reserved.
 .\" Copyright (c) 1996, Jason Downs.  All rights reserved.
@@ -84,6 +84,9 @@ The
 .Fn opendev
 return value and errors are the same as the return value and errors of
 .Xr open 2 .
+.Sh WARNINGS
+realpath points to internal static storage space that will be
+overwritten by subsequent calls.
 .Sh SEE ALSO
 .Xr open 2 ,
 .Xr getrawpartition 3