sys/netinet6: Fix ABI breakage introduced with RFC 7217 supportHEADmain

commit 31ec8b6407fdd5a87d70265762457c67ce618283 added a `dad_failures`
variable to `struct nd_ifinfo`, which broke the netowrking ABI.

This commit fixes it by moving such variable to `struct in6_ifextra`
which is not a public interface, while `struct nd_ifinfo` is back
in its original state.

Thanks to kib, markj and glebious for their help and suggestions
in solving this problem.

Reported by:	"Herbert J. Skuhra" <herbert@gojira.at>
Tested by:	"Herbert J. Skuhra" <herbert@gojira.at>
Approved by:	glebius
Fixes:		31ec8b6407fdd5a87d70265762457c67ce618283

0 files changed, 0 insertions, 0 deletions