- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

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

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

Refresh vendor driver version which adds ARC-1224 support.

Many thanks to Areca for continuing to support FreeBSD.

Submitted by: 黃清隆 <ching2048 areca com tw>
MFC after: 3 days

Update arcmsr(4) to vendor version 1.20.00.26, this adds
support for their new RAID adapter ARC-1214.

Many thanks to Areca for continuing to support FreeBSD.

Submitted by: 黃清隆 Ching-Lung Huang <ching2048 areca com tw>
MFC after: 2 weeks

Update arcmsr(4) to vendor version 1.20.00.25.

Many thanks to Areca for continuing to support FreeBSD.

Submitted by: Ching-Lung Huang <ching2048 areca com tw>
MFC after: 2 weeks

Update manual page with respect to latest driver.

While I'm there remove ARC-1180 which doesn't seem to exist.

ARC-1680 is supported.

Submitted by: Steven Hartland <killing@multiplay.co.uk>
MFC after: 3 days

Sync the hardware list with the driver and with what I could find on
the Areca website.
Also remove the module from the FILES section, it's already covered in
the SYNOPSIS.

MFC after: 3 days

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

MFC after: 3 days

Reword the HARDWARE section to include the driver name (important for
the hardware notes that are generated from it).

- new sentence, new line
- small language fix

Add a manual page for the arcmsr driver.