fmdiff 20150915
fmdiff 20150915

fmdiff 20150915 and switch to GitHub releases

Fixes #42492

Closes #44017.

Signed-off-by: Dominyk Tiller <53e438f55903875d07efdd98a8aaf887e7208dd3@gmail.com>

kwilczynski/homebrew,kwilczynski/homebrew,kwilczynski/homebrew,kwilczynski/homebrew