Adds actual working and feild tested wallet filter. Can set any amount
of whitelist address's, in conf file or commandline args.
fix daemon deadlock, when doing z_mergetoaddress and mining at same time
(needs more testing on staking chains)
Set z_mergtoaddress to use a 0 expiry height when not doing z-tx's. They
were failing and peers were getting banned trying to broadcast them.
237f115594