NetBSD re-synchronization of the source tree

This brings our tree to NetBSD 7.0, as found on -current on the
10-10-2015.

This updates:
 - LLVM to 3.6.1
 - GCC to GCC 5.1
 - Replace minix/commands/zdump with usr.bin/zdump
 - external/bsd/libelf has moved to /external/bsd/elftoolchain/
 - Import ctwm
 - Drop sprintf from libminc

Change-Id: I149836ac18e9326be9353958bab9b266efb056f0

usr.bin/comm/comm.1

@@ -1,4 +1,4 @@
-.\"	$NetBSD: comm.1,v 1.11 2009/03/09 19:24:32 joerg Exp $
+.\"	$NetBSD: comm.1,v 1.12 2014/04/13 01:45:34 snj Exp $
 .\"
 .\" Copyright (c) 1989, 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -89,8 +89,7 @@ participate in line comparisons.
 .\" .It Ev LC_MESSAGES
 .\" .El
 .Sh EXIT STATUS
-.Nm
-exits 0 on success, \*[Gt]0 if an error occurred.
+.Ex -std
 .Sh SEE ALSO
 .Xr cmp 1 ,
 .Xr diff 1 ,