Alexander V. Chernikov 53a4886d5d Convert ip6_forward() to the new routing KPI.
Update ip6_forward() internals to use deembedded IPv6 addresses
 to simplify calls to the new KPI and prepare for the future
 scope-embedding cleanup.

Add in6_get_unicast_scopeid() and in6_set_unicast_scopeid() scopeid
 operation functions tailored for unicast processing.

Reviewed by:	ae
Differential Revision:	https://reviews.freebsd.org/D24334
2020-04-15 12:56:05 +00:00
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