Bug #130988 for Net-GitHub: protect users from changes of GitHub terms

GitHub's terms of service say that they can change the terms at any time, and that users are bound to new terms immediately upon "continued use of the Website". There's something similar for the privacy statement. (They say something about some changes getting 30 days' notice, but they're quite clear that that doesn't apply to all changes that would be legally significant.) It would be a useful feature for Net::GitHub to protect users against surprise changes to the terms of service, by automating the process of checking whether any changes have happened. The basic idea is that Net::GitHub should keep track of what versions of the terms and privacy statement the user has agreed to, and immediately before making any API request (if it's more than a few seconds since the previous check) it should download the current terms and privacy statement from GitHub and check whether they are versions that the user has agreed to. If the user has agreed, the API request goes ahead, safe in the knowledge that (apart from a few seconds' race condition) the user is comfortable with the terms they'll be bound to by that API request. If either legal document has content that the user has not agreed to, then the API request does not happen, and the module signals an error. I imagine that the list of documents to which the user has agreed would be a text file listing document hashes, by default as a dot-file in the user's home directory. One would want to be able to specify a non-default location for this file when initialising Net::GitHub. There should be some utility program to facilitate the process of reviewing a new legal document and acquiring its hash for potential addition to the approved list. It's important to protect the user from the mistake of reading and agreeing to one version of a document and then storing the hash of a newer version that ey hasn't read. -zefram