Fix didn't help -- backing this out and the change that made it necessary. Revert "Correctly check the secondary/primary parameter setting on dhcp failover configuration"

This reverts commit 24670866827b4e2d7a4a05baaf6d09ee377ce7cb.
This broke correct detection of primary/secondary -- the person in that thread may have had some other config issue, but this broke working/valid configurations. Revert "Correct check to match the right vip based on configured ip. Reported-by: http://forum.pfsense.org/index.php/topic,66234.0.html"

This reverts commit 25f9f3322863eae12f705137d8d414643d7b853f.