In http://localhost/info/content?<URL>
'X' if the URL is in the DontGet section of the configuration file, '+' if the URL is in the cache, '~' if it has been requested and '-' if it is not cached. Actually there should be several state indicators: [DC] in DontGet, but already in the cache, [dC] not in DontGet, but already in the cache. Wait, there are also images=no images, so a third field, "not to be fetched", is called for, etc. As many fields as necessary to nail down (fully describe) the status of the URL. As this isn't a page we look at all day, it's OK to fill it up with more fields. Otherwise users will be baffled as to why images show up as "+", even though one has images=no (today, but not last week!) P.S., just like "ls -l" "drwxr-xr-x" the future fields should line up nicely, no matter what their toggle/state.
