iflib is already a module, but it is unconditionally compiled into the
kernel. There are drivers which do not need iflib(4), and there are
situations where somebody might not want iflib in kernel because of
using the corresponding driver as module.
Reviewed by: marius
Discussed with: erj
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D19041
Since there have been major updates to both drivers in r339338,
refresh the man pages with new and updated information.
Reviewed by: sbruno@, 0mp@, jeffrey.e.pieper@intel.com, manpages
Approved by: re (gjb@, kib@)
Sponsored by: Intel Corporation
Differential Revision: https://reviews.freebsd.org/D15927
