special character domain tld

[frostschutz]

Currently, Google SEO supports UTF-8 in its own URLs, however if the domain itself contains special characters, Google SEO Redirect will mess up unless the bburl is set to the ASCII normal form (xn--foobar-n4a etc.).

Support for this should really be in MyBB itself (already rejected) but I guess we could parse the bburl and at least handle it somewhat gracefully, or if that is too much effort, at the very least display a warning on the plugin status page so the board admin can set the ascii form as bburl directly, thereby working around the issue (with the minor downside of mails looking crappy).