DirAuths that have IPv6 addresses don't include them in their vote on themself
Check out https://consensus-health.torproject.org/consensus-health.html and Control+f for:
BD6A829255CB08E66FBE7D3748363586E46B3810 847B1F850344D7876491A54892F904934E4EB85D 24E2F139121D4394C54B5BCC368B3B411857C413 F2044413DAC2E02E3D6BCF4735A19BCA1DE97281
Also strange: dannenberg votes on ReachableIPv6 but is not itself granted ReachableIPv6
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