[3.7] bpo-33336, imaplib: Legalize MOVE command (GH-6569) by miss-islington · Pull Request #8409 · python/cpython

@mcepl @miss-islington

imaplib now allows MOVE command in IMAP4.uid() (RFC 6851:
IMAP MOVE Extension) and potentially as a name of supported
method of IMAP4 object.
(cherry picked from commit caa331d)

Co-authored-by: Matěj Cepl <mcepl@cepl.eu>

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