[gnutls-devel] GnuTLS | RFC 5280 compliance: GnuTLS accepts CRL files with duplicate revoked entries or duplicate certificate serial numbers. (#1704)

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One happy person created an issue: https://gitlab.com/gnutls/gnutls/-/issues/1704



## Description of problem:
Hello developer, I successfully parsed a CRL file with duplicate revocation entries or duplicate serial numbers using GnuTLS. 

## Version of gnutls used:
GnuTLS 3.8.9

## Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)
Ubuntu

## How reproducible:
certtool --crl-info --inder --infile crl_revoked_dublicate.der
certtool --crl-info --inder --infile crl_revoked_dublicate_serial.der

## Actual results:
GnuTLS successfully parsed all the revoked entries from this CRL file.

## Expected results:
[crl_revoked_dublicate.der](/uploads/b62c62dec541b9efe3523d7f38cbc825/crl_revoked_dublicate.der)

[crl_revoked_dublicate_serial.der](/uploads/c4766ece3d25f4bc8c5a84458463f71a/crl_revoked_dublicate_serial.der)

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