The bulk update request #14261 has been approved by @nonamethanks.
create alias camouflage_helmet -> camouflage_headwear
create alias camouflage_backpack -> camouflage_bag
create alias three-color_desert_(camo) -> desert_camouflage
1. According to tag group:headwear, helmet is listed as a type of headwear which is not hat.
2. Backpack is a type of bag. Just use camouflage bag and backpack instead.