[3.14] gh-78319: Fix implementation of IMAP APPEND UTF8 (GH-9436) (GH-139406)

Make UTF8 support for the IMAP APPEND command RFC 6855 compliant.
(cherry picked from commit 408154d64a7b3d43b05f44ea5c4cdf781bdd1352)

Co-authored-by: Gordon Messmer <gordon.messmer@gmail.com>

Miss Islington (bot) committed 8mo ago

89a7b05f2318e7638c7412b675d0bad269d49534

Parent: f0f0566

Committed by GitHub <noreply@github.com> on 10/7/2025, 8:12:30 PM