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

lib/libc/sys/mlock.2

@@ -1,4 +1,4 @@
-.\"	$NetBSD: mlock.2,v 1.20 2011/02/28 07:17:02 wiz Exp $
+.\"	$NetBSD: mlock.2,v 1.22 2015/02/08 14:10:28 wiz Exp $
 .\"
 .\" Copyright (c) 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"	@(#)mlock.2	8.2 (Berkeley) 12/11/93
 .\"
-.Dd February 28, 2011
+.Dd February 8, 2015
 .Dt MLOCK 2
 .Os
 .Sh NAME
@@ -116,8 +116,8 @@ will fail if:
 Locking the indicated range would exceed either the system or per-process
 limit for locked memory.
 .It Bq Er EINVAL
-The length is negative; or the address or length given is not page
-aligned and the implementation does not round.
+The address or length given is not page aligned and the implementation does
+not round.
 .It Bq Er ENOMEM
 Some portion of the indicated address range is not allocated.
 There was an error faulting/mapping a page.
@@ -131,8 +131,8 @@ is not implemented.
 will fail if:
 .Bl -tag -width Er
 .It Bq Er EINVAL
-The length is negative; or the address or length given is not page
-aligned and the implementation does not round.
+The address or length given is not page aligned and the implementation does
+not round.
 .It Bq Er ENOMEM
 Some portion of the indicated address range is not allocated.
 Some portion of the indicated address range is not locked.