From code coverity scan
- fix some memory leak
- fix some resources leak (fd)
- create fpm_worker_pool_free (shared use)
- possible null dref (wp->user and wp->home can be null)
Merge branch 'PHP-5.3' into PHP-5.4

* PHP-5.3:
  From code coverity scan - fix some memory leak - fix some resources leak (fd) - create fpm_worker_pool_free (shared use) - possible null dref (wp->user and wp->home can be null)