Server certificate request
Prepares a certificate file to be signed by a trusted (root)
CA to authenticate your server. You are the subject of the certificate,
and the CA you send it to will be the certificate issuer. For example,
if you wanted to get a Thawte Server ID, you would create a certificate
request and mail the contents of this generated file to Thawte.
The file you generate is a *.CSR file.