pub const MAX_HAPPY_EYEBALLS_MS: u64 = 600_000;Expand description
Validation bound for upstreams[].timeouts.happy_eyeballs_ms
(DW-030, 10 minutes — the slow-start bound’s twin rationale: a racing
delay past this no longer races anything, it serializes dials behind a
sleeper). 0 is legal and disables racing instead.