PHP fcgi wrapper script

If you create (setup) virtual server by means of Virtualmin, and use it in FCGI mode, then the wrapper create with the following content:

It seems wrong though, based on mod_fcgid documentation, as it shouldn't have PHP_FCGI_CHILDREN directive in it.

PHP child process management (PHP_FCGI_CHILDREN) should always be disabled with mod_fcgid, which will only route one request at a time to application processes it has spawned; thus, any child processes created by PHP will not be used effectively. (Additionally, the PHP child processes may not be terminated properly.) By default, and with the environment variable setting PHP_FCGI_CHILDREN=0, PHP child process management is disabled. The popular APC opcode cache for PHP cannot share a cache between PHP FastCGI processes unless PHP manages the child processes. Thus, the effectiveness of the cache is limited with mod_fcgid; concurrent PHP requests will use different opcode caches.

http://httpd.apache.org/mod_fcgid/mod/mod_fcgid.html

You don't explicitly set PHP_FCGI_CHILDREN but why is it exported then?