[ticket/13297] Add unicode modifier to url/email regular expression patterns

Besides, some functions calls getting replaced with their utf8 forms to allow
extensions introducing international domain names and email addresses.

<a href="https://tracker.phpbb.com/browse/PHPBB3-13297">PHPBB3-13297</a>.
could also be added to the previous array,
just add an empty line between the data sets,
seeing that it has the same output as input should make clear that it does not support it.