Create alias body_odor -> smell

BUR #8082 has been approved by @nonamethanks.

create alias body_odor -> smell

For discoverability

I would rename smell to body_odor and make it imply smell. That way smell can be used for things beyond body odor fetish/it can be filtered.

The bulk update request #8082 (forum #201330) has been approved by @nonamethanks.