Handle HTTP 403 on missing repo metadata #61
Merged
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Some repositories do not have metadata signing enabled even though they provide packages which are signed themselves.
This is the case of e.g. some Amazon Linux repositories: see amazonlinux/amazon-linux-2023#336 (comment)
This PR addresses the case in which a 403 is returned when trying to retrieve such repo metadata files and introduces a utility function to selectively ignore some HTTP error codes.