[RFC] Add mb_levenshtein function

Hello, internals. I did send about mb_levenshtein function at last year. https://externals.io/message/125674 And, I updated an RFC. Please check below: https://wiki.php.net/rfc/mb_levenshtein I would like moving forward to vote phase an RFC. Feel free to comment, If nothing anymore, I will start vote at 2 weeks. Thank you. Yuya -- --------------------------- Yuya Hamada (tekimen) - https://tekitoh-memdhoi.info - https://github.com/youkidearitai -----------------------------