Booting 2nd(!) FreeBSD installation sitting on same disk

[jb]

jb <jb.1234abcd <at> gmail.com> writes:

> ... 
> I do not know the story of active slice in FreeBSD, but I know that neither
> Windows nor Linux require active partitions (in their jargon) to boot from any
> more.
> Perhaps it is time to review this requirement in FreeBSD and drop it if
> possible.
> Opinions are welcome.
> If there are no counterarguments, we will create a PR# to start the process.

I forgot to mention that in such case a new boot option would be introduced to
set a default boot item in a boot manager's menu.
jb