[issue39780] Add HTTP Response code 103

[Ali McMaster]

Change by Ali McMaster <alimcmaster1 at gmail.com>:


----------
keywords: +patch
pull_requests: +18040
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/18681

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39780>
_______________________________________