IPv6 some fixes

[fushkrujs]

Here is a patch for known issues if you use OSCam with IPV6SUPPORT


If the reader have an AAAA and an A record and the connect via IPv6 failed - there is now an automatic fallback to IPv4.

If a user connects(with a set 'hostname' parameter) and have an AAAA and an A record - there is now an automatic fallback to IPv4 name resolution, if IPv6 does not match.


ipv4force (always use IPv4)

If the reader you want to connect to have an AAAA and an A record, but you wont to connect to the ipv4 socket, there is no possibility to force the use of IPv4.


config via oscam.server: (or webif)

[foo-reader]
ipv4force = {0|1}

bind webif at defined ip


config via oscam.conf: (or webif)

[webif]
serverip = {ipv4-addr|ipv6-addr}