Custom dhparam

[Shawn Heisey]

Each time I renew my certificate, I generate a new 4096 bit dhparam 
value and append it to the certificate file that I use with all my 
TLS-capable software. The pem-formatted certificate file contains 4 
things:  The server cert, the letsencrypt issuing cert, the private key, 
and that newly generated dhparam.  Because of the private key, I set 
0600 permissions on the file.

When there is a dhparam in the certificate file, does postfix use it?  I 
believe that haproxy does, which is where I got the idea to include a 
custom dhparam with every certificate.

Thanks,
Shawn