Some explanation of what to do and what flavor of "regex" syntax is accepted would be good. I'm guessing it's a javascript syntax, but I don't really remember h

Some explanation of what to do and what flavor of "regex" syntax is accepted would be good. I'm guessing it's a javascript syntax, but I don't really remember how different it is from pcre, does it have lookahead/lookbehind assertions and all that. Also cloudflare's free ssl doesn't work everywhere, letsencrypt is better at that and also free. Had to open the thing in chrome.