add dynamic speed limit

fix old user limit info not clear
fix some wrong names

api/panel/interface.go

@@ -0,0 +1,10 @@
+package panel
+
+type Panel interface {
+	GetNodeInfo() (nodeInfo *NodeInfo, err error)
+	GetUserList() (userList []UserInfo, err error)
+	ReportUserTraffic(userTraffic []UserTraffic) (err error)
+	Describe() ClientInfo
+	GetNodeRule() (ruleList []DetectRule, protocolList []string, err error)
+	Debug()
+}