chore(Core/Misc): warhead -> acore (#17447)

src/server/apps/worldserver/Main.cpp

@@ -431,7 +431,7 @@ int main(int argc, char** argv)
 
     // 0 - normal shutdown
     // 1 - shutdown at error
-    // 2 - restart command used, this code can be used by restarter for restart Warheadd
+    // 2 - restart command used, this code can be used by restarter for restart AzerothCore
 
     return World::GetExitCode();
 }

src/server/game/Battlegrounds/Arena.h

@@ -63,4 +63,4 @@ private:
     void EndBattleground(TeamId winnerTeamId) override;
 };
 
-#endif // WARHEAD_ARENA_H
+#endif // ACORE_ARENA_H

src/server/game/Battlegrounds/ArenaScore.h

@@ -72,4 +72,4 @@ protected:
     std::string TeamName{};
 };
 
-#endif // WARHEAD_ARENA_SCORE_H
+#endif // ACORE_ARENA_SCORE_H

src/server/shared/Secrets/SecretMgr.h

@@ -15,8 +15,8 @@
  * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef __WARHEAD_SECRETMGR_H__
-#define __WARHEAD_SECRETMGR_H__
+#ifndef __ACORE_SECRETMGR_H__
+#define __ACORE_SECRETMGR_H__
 
 #include "BigNumber.h"
 #include "Common.h"