5 is not a valid version for .Nx, so change it to 5.0.

libexec/ld.elf_so/ld.elf_so.1

@@ -1,4 +1,4 @@
-.\"	$NetBSD: ld.elf_so.1,v 1.9 2007/05/18 21:44:08 christos Exp $
+.\"	$NetBSD: ld.elf_so.1,v 1.10 2007/09/13 21:32:14 tnn Exp $
 .\"
 .\" Copyright (c) 2001 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -226,7 +226,7 @@ The ELF shared library model employed first appeared in Sys V R4.
 .Pp
 The path expansion variables first appeared in Solaris 10, and
 in
-.Nx 5 .
+.Nx 5.0 .
 .Sh SECURITY CONSIDERATIONS
 The environment variables
 .Ev LD_LIBRARY_PATH