lint: forbid github /files/ links as they may contain comment attachments #787
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GitHub /files/ links include comment attachments, meaning that anyone can upload a file that looks like it's official to a particular repository. Due to the opaqueness of who uploaded what, this rule forbids it's use.
See https://www.mcafee.com/blogs/other-blogs/mcafee-labs/redline-stealer-a-novel-approach/ for a recent attack that abused this feature.
NOTE: Do not merge this until we fix the one instance of this URL in wolfi: wolfi-dev/os#17679 is addressed.