Implement command line argument to set the amount of agents created by the miner

Defaults to the amount of cores available on the CPU

cmd/mist/flags.go

@@ -63,6 +63,7 @@ var (
 	DebugFile       string
 	LogLevel        int
 	VmType          int
+	MinerThreads    int
 )
 
 // flags specific to gui client
@@ -137,6 +138,8 @@ func Init() {
 	flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap")
 	flag.IntVar(&MaxPeer, "maxpeer", 30, "maximum desired peers")
 
+	flag.IntVar(&MinerThreads, "minerthreads", runtime.NumCPU(), "number of miner threads")
+
 	flag.Parse()
 
 	var err error