Include 404.html in the various tests too.
Include 404.html in the various tests too.

FeodorFitsner/mpc-hc.org,mpc-hc/mpc-hc.org,FeodorFitsner/mpc-hc.org,mpc-hc/mpc-hc.org,FeodorFitsner/mpc-hc.org,mpc-hc/mpc-hc.org