While playiong with an arm64 RPi3 I had problems booting it. I asked for help on the mailing lists and was pointed to this loader.env thing [1].
This solved my problem, but I noticed this is very poorly documented, and never came out with my multiple searches in man pages and with search engines online.
So I thought adding a little paragraph about this could be useful. I wrote the base minimum, but I'm open to suggestions on how to improve the entry. I took some of the text from the comments in the code parsing the file [2]
I also know nothing about man page syntax, I hope I got what I did right.
[1] https://lists.freebsd.org/archives/freebsd-arm/2023-November/003249.html
[2] https://cgit.freebsd.org/src/tree/stand/efi/loader/main.c#n998