bpo-39128: Added algorithm description (GH-18624)



# [bpo-39128](https://bugs.python.org/issue39128): happy eyeballs description

# [3.9] 39128 - happy eyeballs description (GH-18624)
# [3.8] 39128 - happy eyeballs description (GH-18624)



https://bugs.python.org/issue39128
1 file changed