git: inet6: Restore ND6_LLINFO_WAITDELETE

[Roy Marples]

commit d5c61e7cdb8fceb3e092a669e8e8972ff82dfe9f
Author: Roy Marples <roy at marples.name>
Date:   Wed Sep 11 16:06:51 2019 +0100

    inet6: Restore ND6_LLINFO_WAITDELETE
    
    This predates DragonFlyBSD by quite a few years, but
    ND6_LLINFO_WAITDELETE was removed in 2000 from all the BSD's.
    This change brings it back so that if someone *really* wants
    to resolve the unresolvable we don't constant delete
    and add cloned routes which is just a waste of resources.
    
    It also helps to return EHOSTDOWN more consistently to senders.
    If we don't resolve the address during the normal wait cyckle OR
    attempt to resolve it again while in the ND6_LLINFO_WAITDELETE
    state, then then cloned route is then freed.

Summary of changes:
 sys/netinet6/nd6.c | 24 +++++++++++++++---------
 sys/netinet6/nd6.h |  9 +--------
 2 files changed, 16 insertions(+), 17 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/d5c61e7cdb8fceb3e092a669e8e8972ff82dfe9f


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