Listen on IPv4 and IPv6

[ra-at-diladele-com]

Currently we only listen on the IPv4 port 8080 or 8443 in WFP.
To support IPv6 we need to listen on any IPv6 port too as described at https://stackoverflow.com/questions/31125229/accept-ipv4-and-ipv6-together-in-boostasio

[ra-at-diladele-com]

Note the change might mean:

• we need to support 4 listeners (2 for 8080/8443 as now and 2 more for IPv6 version of 8080, 8443)
• we also need to see how the resolver would work and also how the parallel origin connect would work with IPv4 and IPv6 origin connections separately

[ra-at-diladele-com]

As amount of changes is significant - most probably we will postpone this for a while.