Bug#4109 - setsockopt() call for IPV6_TCLASS should use IPPROTO_IPV6.
Merge pull request #49 from proftpd/inet-ipv6-tclass-bug4109

Bug#4109 - setsockopt() call for IPV6_TCLASS should use IPPROTO_IPV6.
Updated NEWS for fix of Bug#4109.
Merge branch 'master' into tls-psk-support