TRITON-1154 delivery of custom driver.conf needs to be demystified

This PR was migrated-from-gerrit, https://cr.joyent.us/#/c/5424/.
The raw archive of this CR is here.
See MANTA-4594 for info on Joyent Eng's migration from Gerrit.

CR discussion

@rmustacc commented at 2019-01-24T23:20:21

Patch Set 1:

(2 comments)

Patch Set 1 code comments

README.md#94 @rmustacc

Maybe worth describing this more generally? As this isn't specific to driver.conf files, but really any files you want to show up via boot-time modules. Just in this case we've put something on the kernel's module search path.

README.md#97 @rmustacc

I think I'd probably clarify that the path that it's laid out in needs to match where you want it to show up, that files used this way will show up under /system/boot, and that booter will automatically add any files it finds under there.