Provide clearer warnings for upgrade issues related to #1930
Summary
Upgrading from 11.11.4 to 12.0.2 I ran headlong into problems described in #1930 (closed). There is clear info that there is a workaround available and that the issue won't be fixed and that's OK. But with 12.0 upgrading the database by default there should be a clear warning and a link to #1930 (closed) in the upgrade description
Steps to reproduce
This is an issue with documentation. Please look at the GitLab Omnibus 12 changes doc page.
What is the current bug behavior?
No mention of #1930 (closed)
What is the expected correct behavior?
With 12.0 defaulting to database upgrade there should be a clearer warning of problems related to #1930 (closed)