#35 Subnet search fix

[Uroš Berglez]

Hi,

I've created a fix for searching the IPs. We often search for an IP. If the IP does not exist yet, the system should (in our opinion) show the subnet it belongs to. Searching IPv6 addresses in the same manner was added aswell.

See commits on https://github.com/UrosB/phpipam

Best regards,
Uros