[issue38863] Improve is_cgi() in http.server

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

The change introduced a reference leak, see bpo-38962. Pablo fixed it:

commit 24f5cac7254177a4c9956d680c0a9b6dadd85c6f (HEAD -> master, upstream/master)
Author: Pablo Galindo <Pablogsal at gmail.com>
Date:   Wed Dec 4 09:29:10 2019 +0000

    bpo-38962: Fix reference leak in test_httpservers (GH-17454)

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nosy: +vstinner

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