Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Preceed/preceeding are not english words. Use precede and preceding.

$Id$ -> $FreeBSD$

Updates to support adding driver files outside the i386 area.
Submitted by: Daniel O'Connor <doconnor@gsoft.com.au>

Some helpful improvements :

- be smarter about locating driver description files.
- be smarter about whether we are really looking at a kernel tree
- fix option handling

This commit was generated by cvs2svn to compensate for changes in r21912,
which included commits to RCS files with non-trunk default branches.

This is KernelDriver, a tool for automating the addition of
third-party device-driver source to the FreeBSD kernel (at versions
2.2 and later). It can list and remove drivers it's added too.

It can (should) be included by device-driver authors in their driver
distributions, but is perhaps a little too specific to warrant a place
in the mainstream distribution.