Binding to IPv6 address doesn't work

[GermanPumpkin]

When a IPv6 is used as an address for the nameserver/agent..., the binding fails, because the address gets malformatted in the _common_address_to_host_port(addr) method of address.py.
Or is there a special format for the IPv6 required? I formatted it like this (with port): 'fd46:f8f6:ef3f:1:4ee3:7df0:d85e:763e:12345'

For context: I want to use osBrain in a Thread-network, which is based on IPv6.