Update for c/image's update of github.com/gobuffalo/pop

> go get github.com/containers/image/v5@main
> go mod tidy -go=1.16 && go mod tidy -go=1.17
> make vendor

The (go mod tidy) pair is necessary to keep c/image CI working.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

vendor/github.com/letsencrypt/boulder/errors/errors.go

@@ -1,3 +1,13 @@
+// Package errors provides internal-facing error types for use in Boulder. Many
+// of these are transformed directly into Problem Details documents by the WFE.
+// Some, like NotFound, may be handled internally. We avoid using Problem
+// Details documents as part of our internal error system to avoid layering
+// confusions.
+//
+// These errors are specifically for use in errors that cross RPC boundaries.
+// An error type that does not need to be passed through an RPC can use a plain
+// Go type locally. Our gRPC code is aware of these error types and will
+// serialize and deserialize them automatically.
 package errors
 
 import (
@@ -12,7 +22,10 @@ import (
 // BoulderError wrapping one of these types.
 type ErrorType int
 
+// These numeric constants are used when sending berrors through gRPC.
 const (
+	// InternalServer is deprecated. Instead, pass a plain Go error. That will get
+	// turned into a probs.InternalServerError by the WFE.
 	InternalServer ErrorType = iota
 	_
 	Malformed
@@ -101,6 +114,20 @@ func RateLimitError(msg string, args ...interface{}) error {
 	}
 }
 
+func DuplicateCertificateError(msg string, args ...interface{}) error {
+	return &BoulderError{
+		Type:   RateLimit,
+		Detail: fmt.Sprintf(msg+": see https://letsencrypt.org/docs/duplicate-certificate-limit/", args...),
+	}
+}
+
+func FailedValidationError(msg string, args ...interface{}) error {
+	return &BoulderError{
+		Type:   RateLimit,
+		Detail: fmt.Sprintf(msg+": see https://letsencrypt.org/docs/failed-validation-limit/", args...),
+	}
+}
+
 func RejectedIdentifierError(msg string, args ...interface{}) error {
 	return New(RejectedIdentifier, msg, args...)
 }