Set style to player when random nation is selected.

See bug #21721


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24588 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Made next_extra_for_tile() to return NULL if EC_IRRIGATION extra is searched for a
tile that would be transformed by irrigate activity. Similar for EC_MINE and mining
activity.

See patch #4520


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24589 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Use AS_HELP_STRING with all AC_ARG_WITH and AC_ARG_ENABLE macros in m4-files.

See patch #4550


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24590 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Do not treat transports with orders as potential refuel points in
pathfinding.

Reported anonymously.

See gna bug #20625.

git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24591 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Use present = FALSE requirements instead of nreqs vector in civ2civ3 effects.ruleset

See patch #4553


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24594 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Made it possible to move units with keypad keys in sdl2-client.

See patch #4527


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24595 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Always announce to players of both ends when traderoute gets canceled.

See patch #4526


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24596 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Added achievement types Cultured_City and Cultured_Nation.

See patch #4531


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24599 a0f10bec-cc02-0410-94fc-a9cfff90b4cd