Merge: #23539: Set Content-Length to 0 for PUT, POST, and PATCH if body is None.

diff --cc Doc/library/http.client.rst
Simple merge

diff --cc Lib/http/client.py
Simple merge

diff --cc Lib/test/test_httplib.py
Simple merge

diff --cc Misc/ACKS
Simple merge

diff --cc Misc/NEWS
Simple merge