```
Do not mention loading modules via loader.conf
It is generally discouraged to load graphics kernel modules via loder.conf(5).
According to kevans@, loader.conf loading Nvidia modules is fragile for UEFI on FreeBSD <= 12.1.
It might work, but those modules are large and may push the loader past the area allocated
for kernel/module staging.
Also, while here, encourage people to use sysrc to modify the contents of
rc.conf(5).
```