IPv6: Invalid binding to IPv6 address when zone id identifier is specified

AS7 binds incorrectly in several cases when IPv6 address setting includes zone id identifier. For ex. ::1%lo produces correct binding at all (::1:3528 too), but fe80::200:ff:fe00:1%p2p1 (link-local IPv6 address of network interface p2p1) produces binding to :::3528 (it's an issue).

Warning: In multiple homed servers (= server with several physical network interfaces/network cards) it is possible to have more than one network interface with the same IPv6 address (compare it to IPv4 world where this case isn't possible) - IPv6 link local address is unique only on link and so the setting needs to include network identifier (network interface name or its index) - every networked AS7 component has to accommodate this setting and produces correct binding.