Add note that headers added via urllib.request.add_header are added to redirected requests (GH-30708) (#92004)

(cherry picked from commit f348154c8f)

Co-authored-by: Ashwin Ramaswami <aramaswamis@gmail.com>

Co-authored-by: Ashwin Ramaswami <aramaswamis@gmail.com>
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Miss Islington (bot) 2022-04-27 15:26:42 -07:00 committed by GitHub
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@ -547,7 +547,8 @@ request.
name, and later calls will overwrite previous calls in case the *key* collides.
Currently, this is no loss of HTTP functionality, since all headers which have
meaning when used more than once have a (header-specific) way of gaining the
same functionality using only one header.
same functionality using only one header. Note that headers added using
this method are also added to redirected requests.
.. method:: Request.add_unredirected_header(key, header)