[Patch] mail_log plugin supports remote, local ip addresses

Hello,

In attached file you will find patch for mail_log plugin to output local, remote ip addresses. It may be usefull for somebody.

To enable support for dovecot 2.2.x versions change the line 'include "net.h"' instead of 'include "network.h"'.

Thank you.

P.S. Sorry, for previous empty message.

-- With Best Regards, Vitaliy T.