MINOR: mux/frontend: Add 'proto' keyword to force the mux protocol
For now, it is parsed but not used. Tests are done on it to check if the side
and the mode are compatible with the proxy's definition.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index ff2771f..181e523 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -10995,6 +10995,16 @@
smoother inter-process load balancing. Currently Linux 3.9 and above is known
for supporting this. See also "bind-process" and "nbproc".
+proto <name>
+ Forces the multiplexer's protocol to use for the incoming connections. It
+ must be compatible with the mode of the frontend (TCP or HTTP). It must also
+ be usable on the frontend side. The list of available protocols is reported
+ in haproxy -vv.
+ Idea behind this optipon is to bypass the selection of the best multiplexer's
+ protocol for all connections instantiated from this listening socket. For
+ instance, it is possible to force the http/2 on clear TCP by specifing "proto
+ h2" on the bind line.
+
ssl
This setting is only available when support for OpenSSL was built in. It
enables SSL deciphering on connections instantiated from this listener. A