Summary renderer doesn't respect non-top-level links

[Arantor]

I'm testing this out on an installation that lives at localhost/moodle34/ and on the list of tests, none of the links work because they all end up pointing at localhost/local/cleanurls/

Easy fix - in classes/output/webserver_summary_renderer.php, where there is the html_writer::link call, just have it call via moodle_url instantiation:

html_writer::link(new \moodle_url("/local/cleanurls/webservertest.php?details={$classname}"), $webtest->get_name()),