dns: support IPv6 reverse queries
dns: support IPv6 reverse queries

crossdistro/netresolve,andyvand/cygnetresolve,pavlix/netresolve,pavlix/netresolve,crossdistro/netresolve,andyvand/cygnetresolve,andyvand/cygnetresolve,pavlix/netresolve,crossdistro/netresolve