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