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

libexec/getty/main.c

@@ -304,16 +304,20 @@ main(int argc, char *argv[], char *envp[])
 	if (argc > 1)
 		tname = argv[1];
 	for (;;) {
+#if !defined(__minix)
 		int off;
+#endif /* !defined(__minix) */
 
 		rval = 0;
 		gettable(tname, tabent);
 		if (OPset || EPset || APset)
 			APset++, OPset++, EPset++;
 		setdefaults();
+#if !defined(__minix)
 		off = 0;
+#endif /* !defined(__minix) */
 		(void)tcflush(0, TCIOFLUSH);	/* clear out the crap */
-#ifndef  __minix
+#if !defined(__minix)
 		(void)ioctl(0, FIONBIO, &off);	/* turn off non-blocking mode */
 		(void)ioctl(0, FIOASYNC, &off);	/* ditto for async mode */
 #endif /* !defined(__minix) */

libexec/getty/subr.c

@@ -458,7 +458,6 @@ compatflags(long flags)
 		CLR(cflag, HUPCL);
 	else
 		SET(cflag, HUPCL);
-
 #if !defined(__minix)
 	if (ISSET(flags, CRTKIL))
 		SET(lflag, ECHOKE);

libexec/getty/ttys.5

@@ -1,4 +1,4 @@
-.\"	$NetBSD: ttys.5,v 1.18 2012/04/21 12:27:28 roy Exp $
+.\"	$NetBSD: ttys.5,v 1.20 2015/02/12 07:32:09 aymeric Exp $
 .\"
 .\" Copyright (c) 1985, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -199,7 +199,7 @@ program must be run for changes in those flags to take effect on the devices.
 # root login on console at 1200 baud
 console	"/usr/libexec/getty std.1200"	vt100	on secure
 # dialup at 1200 baud, no root logins
-ttyd0	"/usr/libexec/getty d1200"	dialup	on	# 555-1234
+tty00	"/usr/libexec/getty d1200"	dialup	on	# 555-1234
 # Mike's terminal: hp2621
 ttyh0	"/usr/libexec/getty std.9600"	hp2621-nl	on	# 457 Evans
 # John's terminal: vt100