Note that static hints no longer break loader hints

[kevans]

Summary

This commentary was carried over from the x86 version of the same code,
but has actually been inaccurate for a while now. As of FreeBSD 12.x,
all environments are used unless they disable each other. See
39d44f7f15c ("kern_environment: use any provided environments [...]")
for details.

[kevans]

Whoops, typoed. Closing manually.