Don't log 404 requests as warns
Don't log 404 requests as warns

They are common enough, mainly because of crawlers,
that can easily clutter the logs. Lower their level
to notice.
Also log the requested URL (not sure why we were not
doing this).

Emapic/emapic,Emapic/emapic,Emapic/emapic,Emapic/emapic