chore: ignore all x-forwarded headers (#5032)

* feat: add support for headers to webhooks

now we are passing x-* headers to source transformer

* chore: ignore all x-forwarded headers

gateway/webhook/webhook.go

@@ -273,7 +273,7 @@ func getXHeaders(req *http.Request) map[string]string {
  xHeaders := make(map[string]string)
  for key, values := range req.Header {
  lowerCaseKey := strings.ToLower(key)
- if strings.HasPrefix(lowerCaseKey, "x-") && lowerCaseKey != "x-forwarded-for" {
+ if !strings.HasPrefix(lowerCaseKey, "x-forwarded-") && strings.HasPrefix(lowerCaseKey, "x-") {
  xHeaders[key] = strings.Join(values, ",")
  }
  }