PVP: Granting honor on PvP-Kill blizzlike (#535)

Added "IsTrivialLevelDifference" to grant honor when the victim has green, yellow or red name.

According to blizzards wow website in 2005 (waybackmachine) honor is granted when the name is green, yellow or red.

"Honorable Kill: killing a player character within your XP range, i.e. a character whose name is colored (green to red), not grey. [...]"

source: https://web.archive.org/web/20050619021442/http://www.worldofwarcraft.com/pvp/honorguide.html

src/game/Entities/Player.cpp

@@ -6603,7 +6603,7 @@ bool Player::RewardHonor(Unit* uVictim, uint32 groupsize)
         if (GetTeam() == pVictim->GetTeam())
             return false;
 
-        if (GetLevel() < (pVictim->GetLevel() + 5))
+        if (!MaNGOS::XP::IsTrivialLevelDifference(GetLevel(), pVictim->GetLevel()))
         {
             AddHonorCP(MaNGOS::Honor::HonorableKillPoints(this, pVictim, groupsize), HONORABLE, pVictim);
             return true;