Datadir '~/.mmgen' and config file 'mmgen.cfg' added:
* Global vars are now overriden in this order:
1) config file
2) environmental variables beginning with 'MMGEN_' (listed in globalvars.py)
3) command line
Always get user entropy, even for non-critical randomness, unless '-r0'.
rpcuser,rpcpassword now override cookie authentication, as with Core.
RPC to remote daemon now supported with '--rpc-host' option.
456cc1f76c