Global replace dirname(__FILE__) -> __DIR__.

answertests.php

bulktest.php

bulktestindex.php

caschat.php

deploy.php

doc/doc.php

doc/docslib.php

doc/maintenance.php

healthcheck.php

locallib.php

plot.php

question.php

questiontestdelete.php

questiontestedit.php

questiontestrun.php

questiontype.php

replacedollars.php

replacedollarsindex.php

settings.php

stack/answertest/controller.class.php