- 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

add missing variable declaration when DEBUG is defined forgotten in
r215046

PR: bin/166404
Submitted by: "Conrad J. Sabatier" <conrads@cox.net>
Approved by: cperciva
MFC after: 3 days

- Save errno values before calling warn(3) so that errors are correctly
reported.
- Check for malloc() failures.

Submitted by: gcooper
MFC after: 1 week

- Don't emit a warning in 'show adapter' if the IOC2 or IOC6 pages are not
present. mpt(4) controllers that do not support RAID do not have an IOC6
page, for example.
- Correct a check for a missing page error in a debug function.

MFC after: 1 week

Add mptutil, a basic utility for managing MPT SCSI/SATA/SAS controllers.
Drive and controller status can be reported, basic attributes changed,
and arrays and spares can be created and deleted.

Approved by: re
Obtained from: Yahoo! Inc.