Improve cookbook entry for error pages in 2.3~
feature #4294 Improve cookbook entry for error pages in 2.3~ (mpdude)

This PR was merged into the 2.3 branch.

Discussion
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Improve cookbook entry for error pages in 2.3~

This PR cherry-picks the improvements from #4293 that apply to 2.3 as well (almost all!).

It also addresses some of the considerations in #4181.

Commits
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f74b6f2 Improve cookbook entry for error pages in 2.3~