- update to 2.6.3:
* see http://www.freeciv.org/wiki/NEWS-2.6.3
* Fixed trouble when a new city is founded to the ruins of a former city,
and that new city establish a trade route with a player who had seen
former city, and is unaware that it had been destroyed HRM#871606
* Fixed a case where shared vision did not completely update
recipient's map HRM#846106
* Fixed a bug where one could paradrop to peaceful nation's territory
after continuing game from an old savegame HRM#879084
* Fixed a bug causing game sometimes to tell wrong reason of why an
action failed HRM#879880
* Cease fire no longer runs out with an already dead player, making his
former allies to hate the alive party of the treaty HRM#879055
* Made server not to end in a infinite loop after loading savegame with
too high phase number. Such a savegame was reported to be created
after spaceship was launched but game was still continued HRM#815196
* Unified writing of the city name Washington-on-the-Brazos
between rulesets, so it doesn't appear multiple times in the same
game in a bit different form HRM#867817
* Stealth units are no longer erroneously hidden even from allies
HRM#764976
* Placing initial units is now done in shuffled player order HRM#850656
* Corrupt worker tasks are cleared. Those can originate, e.g.,
from buggy pre-2.6.2.1 Qt-client, and live in old savegames HRM#901938
* In a ruleset, such as civ2civ3, where caravans can help building wonder
in a foreign city, refresh city info of the city owner when one does
HRM#907977
* Display of success probabilities for diplomats was off when targeting
stack of units instead of individual unit HRM#859761
* Fixed pillaging of extras that are caused by something else than