ReklutaOT custom backpacks added

Client item ID 7476: Crystal Backpack (source Realera item 9059)
Client item ID 7477: Wing Backpack (source Realera item 9452)
Client item ID 7478: Red Skull Backpack (source Realera item 9464)
Client item ID 7479: White Skull Backpack (source Realera item 9465)
Client item ID 7480: Phantom Backpack (source Realera item 9534)
Client item ID 7481: Magmaoid Backpack (source Realera item 9537)

IMPORTANT: server items.otb/items.xml still must map/create these client IDs as containers.
