[docs] [issue39128] Document happy eyeball parameters in loop.create_connection signature docs

Julien Palard <julien+python@palard.fr> added the comment: I merged the first PR about adding parameter, but I'm not closing this issue yet, as Andrew said, a small chapter with a description of Happy Eyeballs algorithm would be nice, if anyone want to write a PR, go for it. ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue39128> _______________________________________