cmdline-opts/_PROTOCOLS.md: mention WS(S)

Closes #13891

diff --git a/docs/cmdline-opts/_PROTOCOLS.md b/docs/cmdline-opts/_PROTOCOLS.md
index 0d4c2374efad969fea9e7547c8715cd314ed5ad6..af7019ab0af097b1743b99efbeca41b3a7389442 100644 (file)
--- a/docs/cmdline-opts/_PROTOCOLS.md
+++ b/docs/cmdline-opts/_PROTOCOLS.md
@@ -49,3 +49,5 @@ Fetching a telnet URL starts an interactive session where it sends what it
 reads on stdin and outputs what the server sends it.
 ## TFTP
 curl can do TFTP downloads and uploads.
+## WS(S)
+WebSocket done over HTTP/1. WSS implies that it works over HTTPS.