Removed inclusion of netinet6/in6.h. This was an artifact of when the core IPv6 symbols were there rather than in netinet/in.h, and now not only is unnecessary but also could create problems (see PR library/781).
Removed inclusion of netinet6/in6.h. This was an artifact of when the core
IPv6 symbols were there rather than in netinet/in.h, and now not only is
unnecessary but also could create problems (see PR library/781).

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars