Path to the Keystore location or to the client's certificate location.
This property can be used to set the path to the client's certificate location, 'ssl.certificate.location'. The client's certificate contains the client's public key.
Only accepts the PEM Certificate format. For example: C:/Keys/KafkaKeys/kafka.client.pem.
The server app will only accept connections from clients with a certificate signed by a trusted CA. Any other certificate that is not trusted by the server will be rejected.