Fix for 231051 - crlutil asserts after deleting CRL. r=wtc, nelsonb
Fix for 231051 - crlutil asserts after deleting CRL. r=wtc, nelsonb

nmav/nss,ekr/nss-old,ekr/nss-old,ekr/nss-old,nmav/nss,nmav/nss,nmav/nss,nmav/nss,ekr/nss-old,nmav/nss,nmav/nss,ekr/nss-old,ekr/nss-old,ekr/nss-old