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-rw-r--r--vendor/golang.org/x/crypto/acme/autocert/autocert.go6
1 files changed, 4 insertions, 2 deletions
diff --git a/vendor/golang.org/x/crypto/acme/autocert/autocert.go b/vendor/golang.org/x/crypto/acme/autocert/autocert.go
index a478eff54..b10102017 100644
--- a/vendor/golang.org/x/crypto/acme/autocert/autocert.go
+++ b/vendor/golang.org/x/crypto/acme/autocert/autocert.go
@@ -83,8 +83,10 @@ func defaultHostPolicy(context.Context, string) error {
// It obtains and refreshes certificates automatically,
// as well as providing them to a TLS server via tls.Config.
//
-// To preserve issued certificates and improve overall performance,
-// use a cache implementation of Cache. For instance, DirCache.
+// You must specify a cache implementation, such as DirCache,
+// to reuse obtained certificates across program restarts.
+// Otherwise your server is very likely to exceed the certificate
+// issuer's request rate limits.
type Manager struct {
// Prompt specifies a callback function to conditionally accept a CA's Terms of Service (TOS).
// The registration may require the caller to agree to the CA's TOS.