blank_censor utility alias

BUR #13579 has been rejected.

create alias shadow_penis -> blank_censor

I keep forgetting the tag for this, and that's the first thing I try every time.

I would have upvoted this if not for the existence of penis shadow, I wouldn't be surprised if some taggers messed it up.

There's some ambiguity here, an invisible penis could also be viewed as a shadow penis.

The bulk update request #13579 (forum #227247) has been rejected by @nonamethanks.