Merge branch 'master' of git.dovecot.net:pigeonhole/core

doc/man/doveadm-sieve.1.in

src/lib-sieve/cmd-redirect.c

src/lib-sieve/plugins/imap4flags/ext-imap4flags-common.c

src/lib-sieve/plugins/imap4flags/ext-imap4flags-common.h

src/lib-sieve/plugins/imap4flags/ext-imap4flags.c

src/lib-sieve/plugins/imap4flags/ext-imapflags.c

src/lib-sieve/plugins/imap4flags/sieve-ext-imap4flags.h

src/lib-sieve/sieve-validator.c

src/lib-sieve/util/edit-mail.c