Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

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

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

Merge LinuxKPI changes from DragonflyBSD:
- Add more list related functions and macros.
- Update the hlist_for_each_entry() macro to take one less argument.

Sponsored by: Mellanox Technologies

Fix compilation when DEBUG is defined.

Sponsored by: Mellanox Technologies
MFC after: 1 month

Update the infiniband stack to Mellanox's OFED version 2.1.

Highlights:
- Multiple verbs API updates
- Support for RoCE, RDMA over ethernet

All hardware drivers depending on the common infiniband stack has been
updated aswell.

Discussed with: np @
Sponsored by: Mellanox Technologies
MFC after: 1 month

Fix build of OFED bits with debugging options enabled.

- Merge in OFED 1.5.3 from projects/ofed/head