Change Details

Completes 11/11 backport of secp256k1 PR830: https://github.com/bitcoin-core/secp256k1/pull/830/commits/c582abade1c50ef50dc7ee9f7b7af8e06e22065d Depends on D8046.

Completes 11/11 backport of secp256k1 [[https://github.com/bitcoin-core/secp256k1/pull/830 | PR830]]: https://github.com/bitcoin-core/secp256k1/pull/830/commits/c582abade1c50ef50dc7ee9f7b7af8e06e22065d Depends on D8046.

Completes 11/11 backport of secp256k1 [[https://github.com/bitcoin-core/secp256k1/pull/830 | PR830:]]: https://github.com/bitcoin-core/secp256k1/pull/830/commits/c582abade1c50ef50dc7ee9f7b7af8e06e22065d Depends on D8046.