[SPDK] 20.10 release merge window

Hello all,

The merge window for SPDK 20.10 release will close by October 23rd.
Please ensure all patches that should be included in the release are merged by this date.
You can do it by adding a hashtag '20.10' in Gerrit on those patches.

The list of tagged patches can be seen here:
https://review.spdk.io/gerrit/q/hashtag:%2220.10%22+status:open

On October 23rd new branch 'v20.10.x' will be created, and a patch on it
will be tagged as release candidate.
Then, by October 30th, a formal release will take place tagging the last
patch on the branch as SPDK 20.10.

Between release candidate and formal release, only critical fixes
shall be backported to the 'v20.10.x' branch.

Thanks,
Tomek