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Fixes the following security issue:
- CVE-2021-3181: rfc822.c in Mutt through 2.0.4 allows remote attackers to
cause a denial of service (mailbox unavailability) by sending email
messages with sequences of semicolon characters in RFC822 address fields
(aka terminators of empty groups). A small email message from the
attacker can cause large memory consumption, and the victim may then be
unable to see email messages from other persons.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit c1413cd94c)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>