Core: header cleanup, split realmlist, boost compatibility, cotire, remove stormlib/zlib and stormlib/bzip2 and instead use dep sources

src/server/game/Addons/AddonMgr.cpp

@@ -119,7 +119,7 @@ SavedAddon const* GetAddonInfo(const std::string& name)
             return &addon;
     }
 
-    return NULL;
+    return nullptr;
 }
 
 BannedAddonList const* GetBannedAddons()