Add hack to SIOCGIFCONF where if ifc_len is 0, fill it in with the size needed and return; Linux does this too.  Suggested by cmetz@inner.net
Add hack to SIOCGIFCONF where if ifc_len is 0, fill it in with the size needed and return; Linux does this too.  Suggested by cmetz@inner.net

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