ip6-nd: punt neighbor advertisements
ip6-nd: punt neighbor advertisements

With this change, punt received neighbor advertisements instead of drop
in order to give other elements of the system an opportunity to handle
them.

Type: improvement
Change-Id: Ie6cde9eebc83e42029967141cb32ebc459fd3680
Signed-off-by: Alexander Chernavin <005bca4307cd9b117df45182181fee477edfa768@netgate.com>

chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp