Since gna.org has gone away: In 2.6, the Gtk3 client (intended to be the default client in that version) has gained options to change the limits. (On reflection, not sure why we made this client-specific.)
Original Gna ticket (archived): <https://web.archive.org/web/https://gna.org/bugs/?16184> Gna ticket where this was added (archived): <https://web.archive.org/web/https://gna.org/patch/?6352> Upstream commit: <https://github.com/freeciv/freeciv/commit/5c31635c4a03674a198e7bfa35dbf56e6e4a0291>
