[10682] New table 'item_convert' for convertion items.

* Implment vendor at show replace BoA item with reputation requirement
  by identical item without rep. reqs for player that fit this requirements
  of original item.

* Table also can be used for store item convertion data form one team items
  to similar other team items. This case not impement but added function easy
  used for it.

* Note: strict single convert for item not created problem for both way use:
  item converted for same team or all, can't be original item for conversion to
  another team.

src/game/ObjectMgr.cpp

@@ -2393,6 +2393,72 @@ void ObjectMgr::LoadItemPrototypes()
         sLog.outErrorDb("Item (Entry: %u) not exist in `item_template` but referenced in `CharStartOutfit.dbc`", *itr);
 }
 
+
+void ObjectMgr::LoadItemConverts()
+{
+    m_ItemRequiredTarget.clear();                           // needed for reload case
+
+    uint32 count = 0;
+
+    QueryResult *result = WorldDatabase.Query("SELECT entry,item FROM item_convert");
+
+    if (!result)
+    {
+        barGoLink bar(1);
+
+        bar.step();
+
+        sLog.outString();
+        sLog.outErrorDb(">> Loaded 0 Item converts . DB table `item_convert` is empty.");
+        return;
+    }
+
+    barGoLink bar((int)result->GetRowCount());
+
+    do
+    {
+        Field *fields = result->Fetch();
+        bar.step();
+
+        uint32 itemEntry    = fields[0].GetUInt32();
+        uint32 itemTargetId = fields[1].GetUInt32();
+
+        ItemPrototype const* pItemEntryProto = sItemStorage.LookupEntry<ItemPrototype>(itemEntry);
+        if (!pItemEntryProto)
+        {
+            sLog.outErrorDb("Table `item_convert`: Item %u not exist in `item_template`.", itemEntry);
+            continue;
+        }
+
+        ItemPrototype const* pItemTargetProto = sItemStorage.LookupEntry<ItemPrototype>(itemTargetId);
+        if (!pItemTargetProto)
+        {
+            sLog.outErrorDb("Table `item_convert`: Item target %u for original item %u not exist in `item_template`.", itemTargetId, itemEntry);
+            continue;
+        }
+
+        // 2 cases when item convert used
+        // Boa item with reputation requirement
+        if ((!(pItemEntryProto->Flags & ITEM_FLAG_BOA) || !pItemEntryProto->RequiredReputationFaction) &&
+            // convertion to another team/race
+            (pItemTargetProto->AllowableRace & pItemEntryProto->AllowableRace))
+        {
+            sLog.outErrorDb("Table `item_convert` not appropriate item %u conversion to %u. Table can be used for BoA items requirement drop or for conversion to another race/team use.", itemEntry, itemTargetId);
+            continue;
+        }
+
+        m_ItemConvert[itemEntry] = itemTargetId;
+
+        ++count;
+    } while (result->NextRow());
+
+    delete result;
+
+    sLog.outString();
+    sLog.outString(">> Loaded %u Item converts", count);
+}
+
+
 void ObjectMgr::LoadItemRequiredTarget()
 {
     m_ItemRequiredTarget.clear();                           // needed for reload case