Fix bug #68423i PHP-FPM will no longer load all pools

The hash need to be unique per IP + Port
Previous version have (IPv4 only)
   sprintf(key, "%u.%u.%u.%u:%u", IPQUAD(&sa_in->sin_addr), (unsigned int) ntohs(sa_in->sin_port));
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  Fix bug #68423i PHP-FPM will no longer load all pools