heads up - amd64 booting is broken

[Paul Goyette <paul%whooppee.com@localhost>]

It seems that amd64 booting is broken, likely as a result of the
recent addition of support for multiboot2.

See [1] and [2]

[1] http://mail-index.netbsd.org/source-changes-d/2019/12/10/msg011875.html
[2] http://mail-index.netbsd.org/source-changes/2019/12/10/msg111777.html


+--------------------+--------------------------+-----------------------+
| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:     |
| (Retired)          | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost     |
| Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost   |
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