Apply netmask to IPv6 address in is_in_net6().
Apply netmask to IPv6 address in is_in_net6().

jdelgadoalfonso/openpgm,jdelgadoalfonso/openpgm,jdelgadoalfonso/openpgm,jdelgadoalfonso/openpgm,jdelgadoalfonso/openpgm,jdelgadoalfonso/openpgm