Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

MFC r227458, r226436:

- change "is is" to "is" or "it is"
- change "the the" to "the"
- other typo fixes

Approved by: lstewart

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

- Merge in OFED 1.5.3 from projects/ofed/head