nbminer CuckooCycle(AE) don't support nicehash extranonce

[angelbbs]

https://www.nicehash.com/blog/post/what-is-extranonce-subscribe-extension-xnsub?lang=en https://github.com/nicehash/Specifications/blob/master/NiceHash_extranonce_subscribe_extension.txt

[dhjw]

Would be nice right now since it's at the top of whattomine