Clean up some LABS related code, remove un-used/needed stuff.

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.

src/komodo_utils.h

@@ -1677,8 +1677,6 @@ void komodo_args(char *argv0)
         fprintf(stderr, "Cannot be STAKED and KMD notary at the same time!\n");
         exit(0);
     }
-    MIN_RECV_SATS = GetArg("-mintxvalue",-1);
-    WHITELIST_ADDRESS = GetArg("-whitelistaddress","");
     memset(ccenables,0,sizeof(ccenables));
     memset(disablebits,0,sizeof(disablebits));
     if ( GetBoolArg("-gen", false) != 0 )