[Freeciv-Dev] (PR#11416) trade routes

["Per I. Mathisen" <per@xxxxxxxxxxx>]

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=11416 >

To simplify the generic_city_refresh() call, in particular to avoid the
possibility of recursiveness, we should update trade routes on turn end,
intead of dynamically.

Right now most calls to g_c_refresh sends a FALSE parameter, which makes
the function not recalc trade routes, but this means city states can
become wrong during the game. The alternative is a possible significant
slowdown in games where you have trade routes.

  - Per