1 Long: key-type
2 Arg: <type>
3 Help: Private key file type (DER/PEM/ENG)
4 Protocols: TLS
5 ---
6 Private key file type. Specify which type your --key provided private key
7 is. DER, PEM, and ENG are supported. If not specified, PEM is assumed.
8 
9 If this option is used several times, the last one will be used.
10