Not really for normal clients to know about or use - but will be really useful for the List server to parse (as well as people knowing what they are doing - e.g: so as to help others check their whitelist vs blacklist configurations).

The Server could also include an MD5/SHA1 of the file in its status output so that the list server only needs to download if the list is changed:

mod_control,1 set in DMPModControl.txt by the server owner causes the list to be hosted at server.example.com:8081

mod_chksum,[SHA1]d3486ae9136e7856bc42212385ea797094475802 set internally by the server using the hash of DMPModControl.txt

I don't get it. Do you mean like, list the mods the server is allows/is using?
If not, when you join a server, you get a message saying which mods are allowed and which are not.

No - it would be just making the DMPModControl.txt public using the HTTP server - normal users do not need to use this feature.

Implemented via 28a3ee9