fix udp nil && add version display on web

lib/version/version.go

@@ -1,8 +1,8 @@
 package version
 
-const VERSION = "0.24.0"
+const VERSION = "0.24.3"
 
 // Compulsory minimum version, Minimum downward compatibility to this version
 func GetVersion() string {
-	return "0.24.0"
+	return "0.24.3"
 }