http://localhost/ isn't converted

[christoph-bessei]

http://localhost/ doesn't match the regular expression of the convert function.
Reason:
The regular expression expects at least one dot inside the domain name.

$this->getSchemes(true) . ")://[a-zA-Z0-9-.]+.[a-zA-Z]{2,3}([/a-zA-Z0-9-._~:?#[]@!$&'()+,;=%">])?)/"