/usr/share/lintian/overrides/dovecot-managesieved is in dovecot-managesieved 1:2.2.13-12~deb8u4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | dovecot-managesieved: hardening-no-fortify-functions usr/lib/dovecot/managesieve-login
dovecot-managesieved: hardening-no-fortify-functions usr/lib/dovecot/modules/settings/libmanagesieve_login_settings.so
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