Improve: enable system proxy by default

core/src/main/golang/proxy/http.go

@@ -89,8 +89,10 @@ func (l *httpListener) handleConn(conn net.Conn) {
 	if err != nil || request.URL.Host == "" {
 		if err != nil {
 			log.Warnln("HTTP Connection closed: %s", err.Error())
+		} else {
+			log.Warnln("HTTP Connection closed: unknown host")
 		}
-		
+
 		_ = conn.Close()
 		return
 	}

service/src/main/java/com/github/kr328/clash/service/store/ServiceStore.kt

@@ -43,7 +43,7 @@ class ServiceStore(context: Context) {
 
     var systemProxy by store.boolean(
         key = "system_proxy",
-        defaultValue = false
+        defaultValue = true
     )
 
     var blockLoopback by store.boolean(