Fix cache options race during renewal checks - #397
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Add concurrent test for certificate renewal checks with cache options.
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Fixes a data race between
Cache.SetOptionsandConfig.certNeedsRenewal.certNeedsRenewalnow readsRenewCheckIntervalunderoptionsMu.RLockonce and uses that local snapshot throughout the renewal decision.Adds a concurrency regression test that runs
Cache.SetOptionsandCertificate.NeedsRenewalin parallel.Related: caddyserver/caddy#7897
Tests:
go test -race ./...