This change adds new parameters to keygen.properties to allow the configuration of the server and client TLS key algorithms: SERVER_KEY_ALG, SERVER_KEY_SIZE, CLIENT_KEY_ALG, CLIENT_KEY_SIZE Default values for these have been set at RSA and 2048 to preserve previous operation. I have also tested SERVER_KEY_ALG=EC and SERVER_KEY_SIZE=256, along with CLIENT_KEY_ALG=EC and CLIENT_KEY_SIZE=256. Other algorithms and sizes may be supported, YMMV.