Initial version of coinbase checking function for GBT and stratum
Share pool coinbase check reaction code
Bugfix: Keep connection active for rejecting and misbehaving pools so we can detect when they recover
pool_check_coinbase: Avoid redisabling an already misbehaving pool
Pool option #skipcbcheck to disable new coinbase checks
Optimise coinbase check logic by using actual script bytes everywhere possible
Bugfix: Accept actual percentages for --coinbase-check-percent
README: --coinbase-check-* options
Merge branch 'coinbase_check' into bfgminer

Conflicts:
	miner.c