- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC r294318:
Add clarifying comment about CQE zipping.

Sponsored by: Mellanox Technologies
Differential Revision: https://reviews.freebsd.org/D4940

MFC r294317:
Declare local variables at top of function.

Sponsored by: Mellanox Technologies
Differential Revision: https://reviews.freebsd.org/D4939

MFC r292838:
Add support for CQE zipping. CQE zipping reduces PCI overhead by
coalescing and zipping multiple CQEs into a single merged CQE. The
feature is enabled by default and can be disabled by a sysctl.

Implementing this feature mlx5_cqwq_pop() has been separated from
mlx5e_get_cqe().

Submitted by: Mark Bloch <markb@mellanox.com>
Differential Revision: https://reviews.freebsd.org/D4598
Sponsored by: Mellanox Technologies

MFC r291938:
Add full support for Receive Side Scaling, RSS, to the mlx5en
driver. This includes binding all interrupt and worker threads
according to the RSS configuration, setting up correct Toeplitz
hashing keys as given by RSS and setting the correct mbuf
hashtype for all received traffic.

Sponsored by: Mellanox Technologies
Differential Revision: https://reviews.freebsd.org/D4410

MFC r290650, r290709, r291067, r291068, r291069 and r291070:
Add mlx5 and mlx5en driver(s) for ConnectX-4 and ConnectX-4LX cards
from Mellanox Technologies. The current driver supports ethernet
speeds up to and including 100 GBit/s. Infiniband support will be
done later.

The code added is not compiled by default, which will be done by a
separate commit.

Sponsored by: Mellanox Technologies
Differential Revision: https://reviews.freebsd.org/D4177
Differential Revision: https://reviews.freebsd.org/D4178
Differential Revision: https://reviews.freebsd.org/D4179
Differential Revision: https://reviews.freebsd.org/D4180

Add mlx5 and mlx5en driver(s) for ConnectX-4 and ConnectX-4LX cards
from Mellanox Technologies. The current driver supports ethernet
speeds up to and including 100 GBit/s. Infiniband support will be
done later.

The code added is not compiled by default, which will be done by a
separate commit.

Sponsored by: Mellanox Technologies
MFC after: 2 weeks