Milter-greylist

Hello,

May I suggest a small improvement for milter-greylist logging.

When milter-greylist does auto-whitelisting by external factors (such as
{greylist} macro being set) it writes only a short message to log. It
would be great if the tuple data is written as well. I mean:

Now:
mg_log(LOG_DEBUG,
       "whitelisted by {greylist}");

Todo:
mg_log(LOG_DEBUG,
       "%s: addr %s[%s] from %s to %s whitelisted by {greylist}",
       priv->priv_queueid, priv->priv_hostname, addrstr,
       priv->priv_from, *envrcpt);

Is there any reason not to do this?

Best regards,
Denis Solovyv