website/docs: add docs for advanced SSH config

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

#2916

internal/outpost/proxyv2/handlers.go

@@ -50,7 +50,7 @@ func (ps *ProxyServer) lookupApp(r *http.Request) (*application.Application, str
 	// Try to find application by directly looking up host first (proxy, forward_auth_single)
 	a, ok := ps.apps[host]
 	if ok {
-		ps.log.WithField("host", host).WithField("app", a.ProxyConfig().Name).Debug("Found app based direct host match")
+		ps.log.WithField("host", host).WithField("app", a.ProxyConfig().Name).Trace("Found app based direct host match")
 		return a, host
 	}
 	// For forward_auth_domain, we don't have a direct app to domain relationship