As reported by David Swift, stunnel's option is "sendproxy".
easy to skip it from the input buffers.
We have a patch available for recent versions of Stunnel that brings it the
-ability to be an emitter. The feature is called "send-proxy" there. The code
+ability to be an emitter. The feature is called "sendproxy" there. The code
for the receiving side has been merged into haproxy and is enabled using the
"accept-proxy" keyword on a "bind" statement. Haproxy will use the transport
information from the PROXY protocol for logging, ACLs, etc... everywhere an