No stats under FreeBSD 10.3

[Michael Grimm]

Larry Rosenman <larryrtx at gmail.com> wrote:

>  fifo_listener stats-mail {
>    group =
>    mode = 0666
>    user =
>  }
>  fifo_listener stats-user {
>    group =
>    mode = 0666
>    user =
>  }

BTW: What is "stats-user" used for? 
I cannot find a reference in http://wiki2.dovecot.org/Statistics

Thanks and regards,
Michael