Merging upstream branch-2.15 [RH git: b75a6f236b]

Merging upstream branch-2.15 [RH git: 566da17c56]
netdev: Refactor AVX512 runtime checks. (#2100393)

Merging upstream branch-2.15 [RH git: 4fe2b46365]
util: Ignore unknown attributes in parse_key_and_mask_to_match(). (#2089331)

Merging upstream branch-2.15 [RH git: 9bc851aa76]
util: Fix unaligned access to tunnel id.
stats.at: Fix frequent failures of the recursion too deep test.

Merging upstream branch-2.15 [RH git: ab1d6faf99]

Merging upstream branch-2.15 [RH git: c904e84c3e]
dpif-xlate: Fix internal CT state for non-recirc traffic.

Merging upstream branch-2.15 [RH git: 873c041417]
dpif: Fix meter use-after-free.
rcu: Add ovsrcu_barrier.

Merging upstream branch-2.15 [RH git: d93e08b22f]
util: Always report ODP_FIT_TOO_LITTLE for IGMP."
dpif: Trigger revalidation if ct tp changes.

Merging upstream branch-2.15 [RH git: 08671b1f53]

Merging upstream branch-2.15 [RH git: 93d7ccfb1f]
linux: Properly access 32-bit aligned rtnl_link_stats64 structs.

Merging upstream branch-2.15 [RH git: 5fb6b64894]
dpif-xlate: Remove mirror assert.
dpdk: Fix tx drops statistic for a down netdev.

vhost: fix queue number check when setting inflight FD [RH git: ba1bcead43]
by: Wenxiang Qian <leonwxqian@gmail.com>
off-by: Chenbo Xia <chenbo.xia@intel.com>
by: Maxime Coquelin <maxime.coquelin@redhat.com>

vhost: fix FD leak with inflight messages [RH git: 9d20e2fe62]
user master might attach fds to inflight
user messages.
off-by: David Marchand <david.marchand@redhat.com>
by: Maxime Coquelin <maxime.coquelin@redhat.com>

Merging upstream branch-2.15 [RH git: 885e0d0ad5]
dpif-xlate: Clear out vlan flow fields while processing native tunnel. (#393566

Merging upstream branch-2.15 [RH git: 87fde112ca]
xlate: Fix crash when forwarding packet between legacy_l3 tunnels.
traffic: Fix fragment reassembly with L3 L4 protocol information.

Really set RTE_ETH_MAXPORTS to 1024 [RH git: 4c53699c3e]