Regression tests against MathOptInterface fail due to linkcheck errror

[fingolfin]

This seems to have started yesterday:

[ Info: CrossReferences: building cross-references.
[ Info: CheckDocument: running document checks.
┌ Error: linkcheck 'https://lpsolve.sourceforge.net/5.5/CPLEX-format.htm' status: 403.
└ @ Documenter ~/work/Documenter.jl/Documenter.jl/src/utilities/utilities.jl:47
[ Info: Populate: populating indices.
ERROR: LoadError: `makedocs` encountered an error [:linkcheck] -- terminating build before rendering.

See for example this log

Visiting < https://lpsolve.sourceforge.net/5.5/CPLEX-format.htm> via my browser or running curl on it works fine for me.

Perhaps they are simply blocking access from GitHub, e.g. because that URL was accessed to often recently ("thanks" to AI scrapers running rampant, people had to become increasingly creative when it comes to detecting and stopping frequent repeated access to web resources).

Anyway, whatever it is, it is persistent so far; the only way around it I can think of is to stop testing that particular link that situation?

[odow]

FIxing upstream by jump-dev/MathOptInterface.jl#2881