mysqldump: ERROR: Option 'debug' used, but is disabled?

Question

MySQL

I want to dump the database with debugging enabled

mysqldump --debug --user='example' --password='123456' 'example.com'

As a result I get

mysqldump: ERROR: Option 'debug' used, but is disabled

Version

mysqldump  Ver 10.13 Distrib 5.6.25, for FreeBSD8.4 (amd64)

The fact that FreeBSD8.4 is outdated is known to me if I cannot update it. No way.
Just in case /etc/my.conf contains

log=/tmp/mysql.log
log-error=/tmp/mysql-errors.log

Answer 1

There in my.conf it is not necessary to allow debug by chance?