systemd_interval option to configure this. The service can now use
Type=notify in the systemd unit file.

Systemd status line will looks like:
Status: "Processes active: 0, idle: 5, Requests: 90, slow: 0, Traffic: 10req/sec"

Watchdog mode is also supported. In this case watchdog interval,
configured in the unit file, override the systemd_interval option.

When not used (default), no change from previous version.

* PHP-5.3:
  From code coverity scan, syscall return value must be check.

To not alter current behaviour, we simply log the problem,
so, if it occurs, the message will give explanation.

This are only warning as they don't block the server,
but such fail can explain strange (not expected) behaviour later.

* PHP-5.3:
  fix more resource leaks

* 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)

- 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)

* PHP-5.3:
  fixed size array cannot be null

* PHP-5.3:
  use limit_extensions as we use security_limit_extensions later (free)
  unused variable