Split the package to build the kmods separatly! Building separately has
multiple benefits:
- it allows user to rebuild when they upgrade their kernel without rebuilding all of the tools which can take a long time.
- it allows us to provide the modules in the new kmods package repository
- it installs the kmods the in the same place as the regular kmods: /boot/modules
It means we can probably get rid of the rc script in favor if letting
users use kld_list mecanism but I will let this decision to the
maintainer based on what it probably best for users.