[Dovecot] Configuring TLS 1.2

[Phillip Odam]

> what operating system?
> what openssl version?
>
> openssl-1.0.1 supports TLS 1.2
> openssl-1.0.0 does not
>

Thanks for that, yeah the OS is GNU Linux and openssl is currently at 
version 1.0.0.

That explains it.