Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

- Fix compile errors from the clang conversion
- Grab AF_SDP_INET from sys/socket.h

Submitted by: Garrett Cooper
Sponsored by: EMC / Isilon Storage Division

- Merge in OFED 1.5.3 from projects/ofed/head