serverlist.json - old json feed that's generated in a nonstandard way
serverlist_v2.json - compatible with lightron feed before 
serverlist_v3.json - compatible with current lightron feed
serverlist.xml - compatible with the old crazy tronners feed, and wrtlprnft feed.
serverlist.nfo - very lightweight binary format, compatible with an old systray C program which name escapes me
serverlist.rss - rss feed with color codes removed