adapt cmd/cli to new backend

- new flag nat for nat support UPNP|PMP
- new flag pmp for PMP gateway IP
- add NatType to utils/cmd to get p2p.NAT from nat type string
- obsolete usepnp flag
- get rid of IsUpToDate and sleep in miner start
- ethereum constructor takes nat type, port, maxpeer
- add pubkey arg to client identity

cmd/ethereum/flags.go

@@ -85,8 +85,13 @@ func Init() {
 	flag.StringVar(&KeyRing, "keyring", "", "identifier for keyring to use")
 	flag.StringVar(&KeyStore, "keystore", "db", "system to store keyrings: db|file (db)")
 	flag.StringVar(&OutboundPort, "port", "30303", "listening port")
+<<<<<<< HEAD
 	flag.StringVar(&NatType, "nat", "", "nat support (UPNP|PMP)")
 	flag.StringVar(&PMPGateway, "gateway", "", "PMP gateway IP")
+=======
+	flag.StringVar(&NatType, "nat", "", "NAT support (UPNP|PMP) (none)")
+	flag.StringVar(&PMPGateway, "pmp", "", "Gateway IP for PMP")
+>>>>>>> adapt cmd/cli to new backend
 	flag.IntVar(&MaxPeer, "maxpeer", 10, "maximum desired peers")
 	flag.IntVar(&RpcPort, "rpcport", 8080, "port to start json-rpc server on")
 	flag.BoolVar(&StartRpc, "rpc", false, "start rpc server")