alias arm_cuffs -> arm_garter

BUR #15894 has been rejected.

create alias arm_cuffs -> arm_garter

Seems to be the same concept. (Though some of them look more like tiny detached sleeves.)

This bulk update request is pending automatic rejection in 5 days.

I see a lot of random things under arm cuffs, like post #6260523, post #6222893, post #6199556, post #5386397. I'd just deprecate it.

This bulk update request has been rejected because it was not approved within 45 days.

The bulk update request #15894 (forum #236711) has been rejected by @DanbooruBot.