Script: Add push to multiple remotes

[OleksiyRudenko]

• https://gist.github.com/rvl/c3f156e117e22a25f242 // https://stackoverflow.com/questions/14290113/git-pushing-code-to-two-remotes#14290145

git remote set-url --add --push <remote name> <url>
if you add multiple repositories like this (to the same remote name), a single push, will push to all of them.