(tls) add a simple description of the TLS configuration routine for debugging

ixwebsocket/IXSocketTLSOptions.h

@@ -43,6 +43,8 @@ namespace ix
 
         const std::string& getErrorMsg() const;
 
+        std::string getDescription() const;
+
     private:
         mutable std::string _errMsg;
         mutable bool _validated = false;