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/gen/vis.3

@@ -1,4 +1,4 @@
-.\"	$NetBSD: vis.3,v 1.39 2013/02/20 20:05:26 christos Exp $
+.\"	$NetBSD: vis.3,v 1.43 2015/05/23 11:47:56 christos Exp $
 .\"
 .\" Copyright (c) 1989, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"     @(#)vis.3	8.1 (Berkeley) 6/9/93
 .\"
-.Dd February 19, 2013
+.Dd May 23, 2015
 .Dt VIS 3
 .Os
 .Sh NAME
@@ -239,11 +239,31 @@ alter this:
 Also encode the magic characters
 .Ql ( * ,
 .Ql \&? ,
-.Ql \&[
+.Ql \&[ ,
 and
 .Ql # )
 recognized by
 .Xr glob 3 .
+.It Dv VIS_SHELL
+Also encode the meta characters used by shells (in addition to the glob
+characters):
+.Ql ( ' ,
+.Ql ` ,
+.Ql \&" ,
+.Ql \&; ,
+.Ql & ,
+.Ql < ,
+.Ql > ,
+.Ql \&( ,
+.Ql \&) ,
+.Ql \&| ,
+.Ql \&] ,
+.Ql \e ,
+.Ql $ ,
+.Ql \&! ,
+.Ql \&^ ,
+and
+.Ql ~ ) .
 .It Dv VIS_SP
 Also encode space.
 .It Dv VIS_TAB
@@ -252,11 +272,10 @@ Also encode tab.
 Also encode newline.
 .It Dv VIS_WHITE
 Synonym for
-.Dv VIS_SP
-\&|
-.Dv VIS_TAB
-\&|
-.Dv VIS_NL .
+.Dv VIS_SP | VIS_TAB | VIS_NL .
+.It Dv VIS_META
+Synonym for
+.Dv VIS_WHITE | VIS_GLOB | VIS_SHELL .
 .It Dv VIS_SAFE
 Only encode
 .Dq unsafe
@@ -417,6 +436,11 @@ The encoding conversion is influenced by the setting of the
 environment variable which defines the set of characters
 that can be copied without encoding.
 .Pp
+If
+.Dv VIS_NOLOCALE
+is set, processing is done assuming the C locale and overriding
+any other environment settings.
+.Pp
 When 8-bit data is present in the input,
 .Ev LC_CTYPE
 must be set to the correct locale or to the C locale.