fix ini configuration default values (#4250)

pkg/config/legacy/client.go

@@ -345,35 +345,19 @@ func copySection(source, target *ini.Section) {
 }
 
 // GetDefaultClientConf returns a client configuration with default values.
+// Note: Some default values here will be set to empty and will be converted to them
+// new configuration through the 'Complete' function to set them as the default
+// values of the new configuration.
 func GetDefaultClientConf() ClientCommonConf {
 	return ClientCommonConf{
 		ClientConfig:              legacyauth.GetDefaultClientConf(),
-		ServerAddr:                "0.0.0.0",
-		ServerPort:                7000,
-		NatHoleSTUNServer:         "stun.easyvoip.com:3478",
-		DialServerTimeout:         10,
-		DialServerKeepAlive:       7200,
-		HTTPProxy:                 os.Getenv("http_proxy"),
-		LogFile:                   "console",
-		LogWay:                    "console",
-		LogLevel:                  "info",
-		LogMaxDays:                3,
-		AdminAddr:                 "127.0.0.1",
-		PoolCount:                 1,
 		TCPMux:                    true,
-		TCPMuxKeepaliveInterval:   60,
 		LoginFailExit:             true,
-		Start:                     make([]string, 0),
 		Protocol:                  "tcp",
-		QUICKeepalivePeriod:       10,
-		QUICMaxIdleTimeout:        30,
-		QUICMaxIncomingStreams:    100000,
+		Start:                     make([]string, 0),
 		TLSEnable:                 true,
 		DisableCustomTLSFirstByte: true,
-		HeartbeatInterval:         30,
-		HeartbeatTimeout:          90,
 		Metas:                     make(map[string]string),
-		UDPPacketSize:             1500,
 		IncludeConfigFiles:        make([]string, 0),
 	}
 }