Description:
------------
When a php-fpm child process shuts down it does not call module shutdown.

Check out sapi/fpm/fpm/fpm_main.c line 1917 in out:

    if (parent) {
        php_module_shutdown(TSRMLS_C);
        sapi_shutdown();
    }

I'm pretty sure this should be 

    php_module_shutdown(TSRMLS_C);
    if (parent) {
        sapi_shutdown();
    }

This caused us problems in our custom PHP extension because we need to clean up 
when a child exits, closing 
sockets and freeing resources.

Thanks.

Patch attached

patch sapi/fpm/fpm/fpm_main.c fpm_child_mshutdown.patch