[SPDK] Preparation for SPDK 22.01 LTS release

Hello all,

The merge window for SPDK 22.01 LTS release will close by January 21st.
Please ensure all patches you believe should be included in the release are merged to 'master' branch by this date.
You can do it by adding a hashtag '22.01' in Gerrit on those patches.

The current set of patches that are tagged and need to be reviewed can be seen here:
https://review.spdk.io/gerrit/q/hashtag:%2222.01%22+status:open

On January 21st new branch 'v22.01.x' will be created, and a patch on it will be tagged as release candidate.
Then, by January 28th, a formal release will take place tagging the last patch on the branch as SPDK 22.01 LTS.

Between release candidate and formal release, only critical fixes shall be backported to the 'v22.01.x' branch.
Development can continue without disruptions on 'master' branch.

Thanks,
Tomek