Update saintmode configuration language for inclusivity

[benzvan]

I was cleaning up some of the archaic language in our projects and discovered we're setting the saintmode.blacklist value on our varnish containers. This terminology should be updated to something more inclusive and more descriptive of its purpose. It would make sense to deprecate the configuration field and replace it with backend_sick_timer or similar descriptive language. Honestly the whole saint, grace, etc. metaphor could be more descriptive.

Instances in code:
https://github.com/search?q=repo%3Avarnish%2Fvarnish-modules%20blacklist&type=code

More details:
https://www.splunk.com/en_us/blog/learn/blacklist-whitelist-inclusivity.html

[gquintard]

I'm in favor, would you care opening a PR for it?

[benzvan]

I can give it a shot. It's been a while since I've worked in C, much less varnish.

[gquintard]

thankfully, you shouldn't have to do C, Varnish 7.1 introduced $Alias that should do your bidding. You can see it used in vmod-cookie

That will leave the old names around for a while, but I don't want to break users without notice

[benzvan]

Oh cool! It looks like I can just update the aliases and documentation and leave the code the same, so here's a draft PR doing that. Let me know if this is what you were thinking. Updating the code looks pretty straightforward but I'm not sure I can run the tests locally right now.

[gquintard]

cleaning, the associated PR has been merged