Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Sync with sys/boot/forth/frames.4th revision 1.2 (PC98 support).

Suggested by: matusita

- Add 'fwrite' and 'fseek' words for writing to and seeking on files.
- Change the 'fopen' keyword to accept a mode parameter. Note that this
will break existing 4th scripts that use fopen. Thus, the loader
version has been bumped and loader.4th has been changed to check for a
sufficient version on i386 and alpha. Be sure that you either do a full
world build or install or full build and install of sys/boot after this
since loader.old won't work with the new 4th files and vice versa.

PR: kern/32389
Submitted by: Jonathan Mini <mini@haikugeek.com>
Sponsored by: ClickArray, Inc.

Good thing about these examples is that no one uses them, so they can
stay broken for months without anyone noticing.

The boot-conf command was changed as to reproduce the behavior of builtin
loader words precisely. As a result, it now always need an argument, possibly
0 indicating that no other arguments are being passed. This broke in a
non-deterministic way (ie, it could go on working as if everything was fine).

Fixes a silly bug that somehow escaped my notice all these months.

$Id$ -> $FreeBSD$

Rewording.

Slight not-exactly-bug-but-useful-as-example-code fix.

Add a menu example making use of loader.4th(8) facilities.

Merge candidate, as it is just an example...

Update example to match new builtin behavior.

Submitted by: Daniel C. Sobral <dcs@newsguy.com>
PR: 9744

Add timeout to boot menu.

Submitted by: W Gerald Hicks <wghicks@bellsouth.net>

Add examples how to use the terminal emulation code in /boot/loader to
create nice startup menus. Improvements are warmly welcome. :-)