Enhancements

Add exprtimental support for generating Mellow configuration.
Add proxy customization for downloading rulesets and subscriptions.
Add more customizations in manage URL arguments.
Optimize codes.
INIReader: Fix line break remove not working.

logger.cpp

@@ -1,8 +1,13 @@
 #include <string>
+#include <iostream>
 
 #include "logger.h"
 
+extern bool print_debug_info;
+
 void writeLog(int type, std::string content)
 {
     //placeholder
+    if(print_debug_info)
+        std::cerr<<"[DEBUG] "<<content<<"\n";
 }