[issue13501] Make libedit support more generic; port readline / libedit to FreeBSD

[serge-sans-paille]

Change by serge-sans-paille <serge.guelton at telecom-bretagne.eu>:


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pull_requests: +16513
pull_request: https://github.com/python/cpython/pull/16986

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue13501>
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