Addons/AddonMgr: converted from singleton to namespace with free functions

src/server/game/Server/WorldSession.cpp

@@ -868,7 +868,7 @@ void WorldSession::ReadAddonsInfo(WorldPacket &data)
 
             AddonInfo addon(addonName, enabled, crc, 2, true);
 
-            SavedAddon const* savedAddon = sAddonMgr->GetAddonInfo(addonName);
+            SavedAddon const* savedAddon = AddonMgr::GetAddonInfo(addonName);
             if (savedAddon)
             {
                 bool match = true;
@@ -883,7 +883,7 @@ void WorldSession::ReadAddonsInfo(WorldPacket &data)
             }
             else
             {
-                sAddonMgr->SaveAddon(addon);
+                AddonMgr::SaveAddon(addon);
 
                 sLog->outDetail("ADDON: %s (0x%x) was not known, saving...", addon.Name.c_str(), addon.CRC);
             }

src/server/game/Server/WorldSession.h

@@ -939,6 +939,8 @@ class WorldSession
         uint32 _accountId;
         uint8 m_expansion;
 
+        typedef std::list<AddonInfo> AddonsList;
+
         time_t _logoutTime;
         bool m_inQueue;                                     // session wait in auth.queue
         bool m_playerLoading;                               // code processed in LoginPlayer