One of the most recurring support requests we get for YOURLS goes like this: "How do I get a – (or a /, or a :) into my keywords?" People want pretty customshort URLs like sho.rt/my-talk or sho.rt/v2:final, and by default YOURLS won't let them. The short answer is "use the get_shorturl_charset filter." The long answer is that, depending on…