Expore --miner.sigkey cli parameter (#2568)

* Actually parse --miner.sigkey from commandline

* typo fix (--miner.miner → --miner)

docs/mining.md

@@ -2,7 +2,7 @@
 
 Support only remote-miners.
 
-* To enable, add `--mine --miner.etherbase=...` or `--mine --miner.miner.sigkey=...` flags.
+* To enable, add `--mine --miner.etherbase=...` or `--mine --miner.sigkey=...` flags.
 * Other supported options: `--miner.extradata`, `--miner.notify`, `--miner.gaslimit`, `--miner.gasprice`
   , `--miner.gastarget`
 * RPCDaemon supports methods: eth_coinbase , eth_hashrate, eth_mining, eth_getWork, eth_submitWork, eth_submitHashrate

turbo/cli/default_flags.go

@@ -77,5 +77,6 @@ var DefaultFlags = []cli.Flag{
 	utils.MinerEtherbaseFlag,
 	utils.MinerExtraDataFlag,
 	utils.MinerNoVerfiyFlag,
+	utils.MinerSigningKeyFlag,
 	utils.SentryAddrFlag,
 }