message: Fix multi Content-Length header.
diff: @@ -1715,6 +1715,10 @@ static void http_build_header(http_context *ctx, zval *object, swString *respons
  {
  header_flag |= HTTP_HEADER_DATE;
  }
  + else if (strncasecmp(key, "Content-Length", keylen) == 0)
  + {
  + continue; // ignore
  + }
  else if (strncasecmp(key, "Content-Type", keylen) == 0)
  {
  header_flag |= HTTP_HEADER_CONTENT_TYPE;
  