Add cmdline

README.md

@@ -425,3 +425,16 @@ typically timeout before TCP even gets a chance to retransmit (the
 initial retransmission timeout is on the order of 3 seconds).  This is
 usually OK, except that one should keep in mind that it has the effect
 of truncating the connection life time distribution.
+
+
+## Testing post-quantum cryptography
+
+Following command line can be used to test TLS handshake with post quantum
+cryptography.
+
+```
+./src/httperf --server cloudflare.com --ssl --periodic-stats --burst-length 1000 --ssl-groups CECPQ2b:CECPQ2 --ssl-protocol TLSv1.3
+```
+
+This command will trigger BoringSSL to generate client hello with public keys
+for SIKE and HRSS.