/usr/share/man/man1/mysqloptimize.1.gz is in mysql-client-5.5 5.5.54-0ubuntu0.12.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/mysqlcheck.1.gz
/usr/share/man/man1/mysqlcheck.1.gz