Don't require the query string ?main-function to have any =value
Don't require the query string ?main-function to have any =value

That is, also handle URLs like ?main-fun&some-param=value, not just
?main-fun=value&some-param=...

debiki/debiki-server-old,debiki/debiki-server-old,debiki/debiki-server-old,debiki/debiki-server-old