# server - standard PSK
-j
-l PSK-CHACHA20-POLY1305

# client- standard PSK
-s
-l PSK-CHACHA20-POLY1305

# server 
-j
-l ECDHE-RSA-AES256-GCM-SHA384:PSK-CHACHA20-POLY1305

# client
-l ECDHE-RSA-AES256-GCM-SHA384:PSK-CHACHA20-POLY1305