Added kcp related configs

transport/hub/kcp/config.go

@@ -0,0 +1,22 @@
+package kcp
+
+type AdvancedConfig struct {
+	Mtu          int  `json:"MaximumTransmissionUnit"`
+	Sndwnd       int  `json:"SendingWindowSize"`
+	Rcvwnd       int  `json:"ReceivingWindowSize"`
+	Fec          int  `json:"ForwardErrorCorrectionGroupSize"`
+	Acknodelay   bool `json:"AcknowledgeNoDelay"`
+	Dscp         int  `json:"Dscp"`
+	ReadTimeout  int  `json:"ReadTimeout"`
+	WriteTimeout int  `json:"WriteTimeout"`
+}
+
+type Config struct {
+	Mode            string          `json:"Mode"`
+	Key             string          `json:"EncryptionKey"`
+	AdvancedConfigs *AdvancedConfig `json:"AdvancedConfig,omitempty"`
+}
+
+var DefaultAdvancedConfigs = &AdvancedConfig{
+	Mtu: 1350, Sndwnd: 1024, Rcvwnd: 1024, Fec: 4, Dscp: 0, ReadTimeout: 60, WriteTimeout: 40, Acknodelay: false,
+}