servercfgfile is a console variable available in all games.
servercfgfile is console variable, tells to server which configure file it execute on map start and map change. Default value is "server.cfg"
"servercfgfile" = "server.cfg"
You can tell server to use another file than default server.cfg, from:
Or, if you have forked servers, multiple servers launched from same program, use launch parameter. Add config file to each server, if you like.
-console -game tf +map cp_dustbowl +servercfg server_1.cfg