> On Dec 22, 2018, at 7:00 AM, r-package-devel-requ...@r-project.org wrote:
>
> (since it's fairly unlikely to get two random failures in a row).

Flakey links are also a problem for packages, per se, as opposed to revdeps.  
For example, I have a package (oce) that has quite a lot of \url{} items in its 
docs, and I get failures quite often. Sometimes the failures will persist 
(perhaps intermittently) for days, as work is done on servers, etc.  My policy 
is to just change \url to \code (usually with a note to tell the user that the 
link is actually likely to work), and that's not a good thing, because it leads 
to less testing. I do not know what the best policy is ... maybe a new macro 
like \checkedurl{} that will make a link if the resource is found, and add a 
note about the link failing to work, otherwise. That way, the package could 
still build, and the user would not be stuck with a lot of non-linked URLs in 
the docs.
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