Merge pull request #15646 from ShinDarth/ticket

Core/Player: implement ResetCoolDownAfterDuel configurable feature
(cherry picked from commit 5b8f1469ca32ff1b02b8f902954e1ffc362c4343)

Conflicts:
	src/server/game/Spells/SpellHistory.cpp
	src/server/game/Spells/SpellHistory.h
	src/server/game/World/World.h

sql/updates/world/2015_11_07_00_world_2015_10_02_01.sql

@@ -0,0 +1,3 @@
+DELETE FROM `trinity_string` WHERE `entry` = 11010;
+INSERT INTO `trinity_string` VALUES
+(11010, 'You had cooldowns before starting the duel, so your cooldowns haven\'t been reset.', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);