The changes in a nutshell:
- Handle v4-mapped as different from v4-compat (this was probably
an existing bug in our code).
- Add policy entries for ULA, above most everything else.
- Put v4-compat, old-style IPv6 site-local and 6bone addresses
way down in the preference table.
The rest is just shuffling numbers around (no actual changes to
priority).
Change-Id: Ieb111e0edd705992bc9d066befaaee95a8c1a5df
d33019030c