K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2018-10-24T02:02:37.137595Z
K 7
svn:log
V 439
lualoader: unload upon kernel change if a kernel was previously loaded

In the majority of cases, a kernel is not loaded before we hit the menu.
However, if a password is set, we'll trigger autoboot and have loadelf'd
beforehand. We also need to take into account one dropping to the loader
prompt and twiddling with things manually; if they try to toggle through
kernels, we'll assume they mean it.

Reported by:	trasz
MFC after:	 3 days

END