Merge branch 'jk/mailinfo-iterative-unquote-comment' into maint-2.43

The code to parse the From e-mail header has been updated to avoid recursion. * jk/mailinfo-iterative-unquote-comment: mailinfo: avoid recursion when unquoting From headers t5100: make rfc822 comment test more careful mailinfo: fix out-of-bounds memory reads in unquote_quoted_pair()