load drivers from the driver floppy if the "driver_floppy" variable is set
in the kernel environment and call this function after probing devices but
before displaying the main menu.
X-MFC after: as soon as I finish committing to current
Approved by: re@ (blanket)
actually does work. Ignore errors from kldload(2) if the errno value is
EEXIST. It would help if this return value were documented in the
kldload(2) manual page.
