/usr/share/games/freeciv/multiplayer.serv is in freeciv-data 2.3.2-1+deb7u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | # Server commands to make multiplayer Freeciv rules
#
rulesetdir multiplayer
# changed game settings are defined in game.ruleset
|