Moved SecQ Mirror Curve Topic to Community Issues

[ChristopherA]

We are in the process of reviewing some old Blockchain Commons repos for archive and/or deletion.

One repo I deleted today is https://github.com/BlockchainCommons/secp256k1-schnorrsig/ as bitcoin-core has now merged schnorr signature support in the upstream master at https://github.com/bitcoin-core/secp256k1 .

There was, however, one issue to preserve in our fork repo, containing interesting thoughts about using a mirror curve to secp256k1 known as SecQ, which would enable some very interesting new bulletproofs. Was at https://github.com/BlockchainCommons/secp256k1-schnorrsig/issue1 that I've moved to this repo at #71 .

As far as I know no code was ever released support this concept. If you know of some, please add to our community issue here.

/cc @maaku @kanzure @jimmysong @realorrandom @sipa @apoelstra @jesseposner