Maybe alias "tfh" into "them's fightin' herds"?

Currently the tag tfh has 2 images. Normally with such a low image count I’d just remove the tags.
 
However, I feel like aliasing it could also serve as useful shorthand, as “them's fightin' herds” is kind of an annoying tag to type. (I actually would’ve suggested this even if the “tfh” tag didn’t even exist; the fact that it does makes it simpler though.)

Fair enough. Done.