Draft: relay: Don't allow DirPort on non-IPv4

David Gouletrequested to merge
dgoulet/tor:ticket40494_045_01 into maint-0.4.5

Our code doesn't allow it and so this prevents an assert() crash if the DirPort is for instance IPv6 only.

Fixes #40494 (closed)

Signed-off-by: David Goulet dgoulet@torproject.org

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