Add Close() method to EthereumApi

To close the handler for LDB

cmd/ethereum/js.go

@@ -91,6 +91,7 @@ func newJSRE(ethereum *eth.Ethereum, libPath string) *jsre {
 func (js *jsre) apiBindings() {
 
 	ethApi := rpc.NewEthereumApi(js.xeth, js.ethereum.DataDir)
+	ethApi.Close()
 	//js.re.Bind("jeth", rpc.NewJeth(ethApi, js.re.ToVal))
 
 	jeth := rpc.NewJeth(ethApi, js.re.ToVal, js.re)

rpc/api.go

@@ -44,6 +44,10 @@ func (api *EthereumApi) xethAtStateNum(num int64) *xeth.XEth {
 	return api.xeth().AtStateNum(num)
 }
 
+func (api *EthereumApi) Close() {
+	api.db.Close()
+}
+
 func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error {
 	// Spec at https://github.com/ethereum/wiki/wiki/Generic-JSON-RPC
 	rpclogger.Debugf("%s %s", req.Method, req.Params)