Please add support for mining BEAM on NiceHash.

NiceHash requires a change in stratum protocol for equihash 150,5. Job message contains additional parameter "nonceprefix", which follows the same rules as "nonceprefix" field in the login response.

Protocol specifications:
https://github.com/nicehash/Specifications/blob/master/Beam_NiceHash_v1.0.txt

After the required change, Bminer could be added to NiceHashMiner Legacy - currently used by more than 70k miners.