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

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

mdoc: move CAVEATS, BUGS and SECURITY CONSIDERATIONS sections to the
bottom of the manpages and order them consistently.

GNU groff doesn't care about the ordering, and doesn't even mention
CAVEATS and SECURITY CONSIDERATIONS as common sections and where to put
them.

Found by: mdocml lint run
Reviewed by: ru

Add some newly supported controllers.

Convert to use a SYNPOSIS section that mentions kernel modules.
Also add "device scbus" where needed.

MFC after: 3 days

Update for the 9550 series of controllers.

Missing hardware entries notices by: nemesis on irc

Added list of supported 9xxxSX models.

Don't mention PATA support, all listed controllers are SATA.

Inspired by: xy <xy@packetflood.net>
MFC after: 3 days

- Make the naming of AMCC's 3ware cards consistent with the current
naming from AMCC.
- Update the list of devices supported by the drivers.

All of the above is based on information from AMCC via vkashyap.

- Add a HARDWARE section which lists supported devices.

Adding man page for 3ware's 9000 series storage controller driver (twa).

Reviewed by: ru