Duplicate specification "disable-ssl" for option "disable-ssl"

Using smtp-cli works fine, but gives me also warnings while sending by starttls. it says:
`Duplicate specification "disable-ssl" for option "disable-ssl"`

changing the file `smtp-cli` executable

` 'disable-starttls|disable-tls|disable-ssl' =>`
to

` 'disable-starttls|disable-tls' =>`

works