allow cookie, header and stream only in cgi mode.

Global.h

@@ -31,7 +31,8 @@ namespace  jet {
       std::map<coreutils::MString, coreutils::MString> headers;
       std::map<coreutils::MString, coreutils::MString> tags;
       char **envp;
-
+      bool cgi = false;
+      
    };
 
 }