Add a missing include
Add a missing include

On windows, struct in6_addr is defined in in6addr.h

jan-cerny/openscap,jan-cerny/openscap,OpenSCAP/openscap,jan-cerny/openscap,OpenSCAP/openscap,redhatrises/openscap,redhatrises/openscap,mpreisler/openscap,jan-cerny/openscap,mpreisler/openscap,mpreisler/openscap,OpenSCAP/openscap,redhatrises/openscap,mpreisler/openscap,mpreisler/openscap,redhatrises/openscap,OpenSCAP/openscap,redhatrises/openscap,mpreisler/openscap,OpenSCAP/openscap,redhatrises/openscap,jan-cerny/openscap,OpenSCAP/openscap,jan-cerny/openscap