Enhancements

Fix not processing quotes in ws-headers in Surge VMess configurations.
Fix when default_url is set and insert_url is not set in YAML configuration and access /sub without url argument, the nodes in default_url will be added twice.
Add /version interface to compatible with some front-end.

src/misc.h

@@ -39,7 +39,9 @@ std::string urlsafe_base64_decode(const std::string &encoded_string);
 std::string urlsafe_base64_encode(const std::string &string_to_encode);
 std::string UTF8ToACP(const std::string &str_src);
 std::string ACPToUTF8(const std::string &str_src);
+std::string trim_of(const std::string& str, char target);
 std::string trim(const std::string& str);
+std::string trim_quote(const std::string &str);
 std::string getSystemProxy();
 std::string rand_str(const int len);
 bool is_str_utf8(const std::string &data);