added the firewallPortForwardNotification and firewallPortForwardNotificationMacFiltering strings
If MAC filtering is enabled in a new port forwatrd record, display a message that asks user to verify if this option is enabled in kernel. Do not allow the outPortField to be blank.
Fixed the duplicateEntry() method to compare port forwarding entries based on all members not just 'inPort'
A fix to the toString() method to add the FORWARD rule to the PREROUTING line. Renamed private members of the class to contain the 'm_' prefix.
A fix to initialize() method to properly parse the PREROUTING line that contains FORWARD rule as well. In the initialize() method.