backport multiple cookie-secrets to 9.11.4-S
We should discuss if it would be ok to also backport this to 9.11. This was added in 9.12 because of concerns about how to introduce a new cookie secret in a large installation.
We should discuss if it would be ok to also backport this to 9.11. This was added in 9.12 because of concerns about how to introduce a new cookie secret in a large installation.