thrush isn't really strictly a genital disease, it's a fungal overgrowth that can occur all over the body, it's a common after-effect of antibiotic use or immune system compromise.
that said, I agree it's a rather unfortunate name.
I'm the original author, and stupidly chose a name I knew was ambiguous (bird/yeast infection). It is a rather dumb joke on the fact that Rust is a fungus as well.
If someone here cares to suggest another name, I'm interested.
This is a version control system.
I mainly was going to comment on how unfortunate the name is, in English this word (minus 1 "s") is a genital disease.