[issue14731] Enhance Policy framework in preparation for adding email6 policies as provisional

[Roundup Robot]

Roundup Robot <devnull at psf.upfronthosting.co.za> added the comment:

New changeset 09e97829ed1e by R David Murray in branch 'default':
Add news entries for #14731 and #12586.
http://hg.python.org/cpython/rev/09e97829ed1e

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue14731>
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