Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Fix a bunch of "sentence not on new line" warnings from igor(1).

MFC after: 1 month

Fix mdoc style nits

PR: kern/168910
Submitted by: gjb
Approved by: gjb
MFC after: 3 days
X-MFC-With: r237178

attach_generic causes missing devices in /dev when the driver
interacts with some non-highpoint controollers. Change attach_generic to
be off by default.

PR: kern/168910
Submitted by: Richard Yao <ryao@gentoo.org>
Approved by: cperciva
No objections by: -hackers
Obtained from: Gentoo FreeBSD
MFC after: 2 weeks

Introduce hw.hptrr.attach_generic loader tunable to deny hptrr driver
attach chips with generic Marvell (non-HighPoint) PCI identification.
These chips are also supported by ata(4). Some vendors, like Supermicro,
are using same chips without providing HPT RAID BIOS.

PR: kern/120842, kern/136750

The hptrr driver first appeared in 6.3, not 5.3.

PR: 120616
Submitted by: Josh Paetzel <josh@tcbug.org>
MFC after: 3 days

Add a note that the hptrr driver supersedes the rr232x driver.

Add the 'hptrr' driver for supporting the following Highpoint RocketRAID
cards:

o RocketRAID 172x series
o RocketRAID 174x series
o RocketRAID 2210
o RocketRAID 222x series
o RocketRAID 2240
o RocketRAID 230x series
o RocketRAID 231x series
o RocketRAID 232x series
o RocketRAID 2340
o RocketRAID 2522

Many thanks to Highpoint for their continued support of FreeBSD.

Submitted by: Highpoint