Disable dumpwallet RPC handler that snuck in.

We do not support this yet, and need to match bitcoin'd behavior
before the function is added back to the RPC handler map.

cmdmgr.go

@@ -40,7 +40,6 @@ type cmdHandler func(chan []byte, btcjson.Cmd)
 var rpcHandlers = map[string]cmdHandler{
 	// Standard bitcoind methods
 	"dumpprivkey":           DumpPrivKey,
-	"dumpwallet":            DumpWallet,
 	"getaddressesbyaccount": GetAddressesByAccount,
 	"getbalance":            GetBalance,
 	"getnewaddress":         GetNewAddress,
@@ -216,6 +215,7 @@ func DumpPrivKey(frontend chan []byte, icmd btcjson.Cmd) {
 
 // DumpWallet replies to a dumpwallet request with all private keys
 // in a wallet, or an appropiate error if the wallet is locked.
+// TODO: finish this to match bitcoind by writing the dump to a file.
 func DumpWallet(frontend chan []byte, icmd btcjson.Cmd) {
 	// Type assert icmd to access parameters.
 	cmd, ok := icmd.(*btcjson.DumpWalletCmd)