SYNOPSIS
        use Sys::Syslog;                        # all except setlogsock()
        use Sys::Syslog qw(:standard :macros);  # standard functions & macros

        openlog($ident, $logopt, $facility);    # don't forget this
        syslog($priority, $format, @args);
        $oldmask = setlogmask($mask_priority);
        closelog();