Change Details

Partial backport of secp256k1#831: https://github.com/bitcoin-core/secp256k1/pull/831/commits/1e0e885c8ac814c3621d9e43e66d60f25e324e8e Depends on D9404.

Partial backport of [[https://github.com/bitcoin-core/secp256k1/pull/831 | secp256k1#831]]: https://github.com/bitcoin-core/secp256k1/pull/831/commits/1e0e885c8ac814c3621d9e43e66d60f25e324e8e Depends on D9404.

Partial backport of [[https://github.com/bitcoin-core/secp256k1/pull/831 | secp256k1#831:]]: https://github.com/bitcoin-core/secp256k1/pull/831/commits/1e0e885c8ac814c3621d9e43e66d60f25e324e8e Depends on D9404.