* GUID
- `guid` field in official PackageItem.lua supposed to make item will be separated even item is stackable item.
- Currently `guid` usage is using item Unique ID that generated when item with GUID flag is appear from package.
- Some item containers in official PackageItem.lua are also separated, not stacked when player obtain it. Example when using atcommand "@item Xmas_Bless". For current implementation, the items are flagged in item_flag.txt (db folder) with flag 4.
- `isNamed` field in item group is replaced by `GUID` and move the `isNamed` as new additional field. See doc/item_group.txt or db/re/item_package.txt.
* NPC:
- Enabled npc/re/other/item_merge.txt and it's now usable.
* Script Command:
- Added `mergeitem` to merge separated items in player's inventory. See doc/script_commands.txt.
* Misc:
- Changed how to broadcast the item that obtained from package with flag `isAnnounced` to intif_broadcast, so it will be announced to all connected map-servers.
- Added some items that flagged as 'item group container' in db/re/item_flag.txt
Signed-off-by: Cydh Ramdh <house.bad@gmail.com>
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