netbsd, netbsd.gz, netbsd.old, netbsd.old.gz, onetbsd, onetbsd.gz
and vmunix, in that order. this is used by the bootable `bootfs'
image (suitable for floppies and cdroms), which contains a netbsd.gz
by default.
while i'm here, fix up `boot [device] -s' which got broke when
booting kernels with a - in their name was fixed..
ports' boot programs. Also added support for loading gzip'd kernels,
useful for booting from floppy. From Jason R. Thorpe <thorpej@nas.nasa.gov>,
tested by Matthew Green <mrg@eterna.com.au> and Erik Fair <fair@clock.org>.
pk