s/sys_syslog/std_syslog/

Remove win32/php_registry.h from include list. That slipped in by accident.

Use php_syslog() for system call. On OpenServer 5, syslog is defined to
var_syslog/sys_syslog which causes various problems.

Submitted by: Paul Gardiner <I.T.Manager@barleychalu.co.uk>