IssuingDistributionPoint
Input for the Issuing Distribution Point CRL extension (RFC 5280 §5.2.5).
The union enforces that at most one of the onlyContains* flags is true.
ts
type IssuingDistributionPoint = IssuingDistributionPointBase | IssuingDistributionPointForUserCerts | IssuingDistributionPointForCaCerts | IssuingDistributionPointForAttributeCerts