/usr/share/man/man1/deliver.1.gz is in dovecot-core 1:2.0.19-0ubuntu2.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/dovecot-lda.1.gz
/usr/share/man/man1/dovecot-lda.1.gz