message: set X-LAGOON header if not present
diff: @@ -406,6 +406,11 @@ backend be_secure:{{$cfgIdx}}
  http-request set-header X-Forwarded-Port %[dst_port]
  http-request set-header X-Forwarded-Proto http if !{ ssl_fc }
  http-request set-header X-Forwarded-Proto https if { ssl_fc }
  +
  + {{/* set X-LAGOON header if it is not already */}}
  + acl h_xlagoon_exists res.hdr(X-LAGOON) -m found
  + http-response set-header X-LAGOON {{env "HOSTNAME" }}>{{$cfgIdx}} unless h_xlagoon_exists
  +
  {{- if matchPattern "(v4)?v6" $router_ip_v4_v6_mode }}
  # See the quoting rules in https://tools.ietf.org/html/rfc7239 for IPv6 addresses (v4 addresses get translated to v6 when in hybrid mode)
  http-request set-header Forwarded for=\"[%[src]]\";host=%[req.hdr(host)];proto=%[req.hdr(X-Forwarded-Proto)]
  