The above example will match http://example.com/foo/bar but not http://foobar.example.com.
* can be used as a wildcard to match all subdomains, including the lack of one. www is matched even when no subdomain is specified.
Starting a rule with re: after the first <nowiki> tag will cause it to be treated as a regular expression. This match will be done using Python's re.match() against a lowercase form of the URL with no protocol.
Exceptions are protocol-insensitive (so the rule http://en.wikipedia.org will match https://en.wikipedia.org/wiki/Foo). Please use http://.
