In v10 release notes, call out sequence changes as a compatibility item.
The previous description didn't make it clear that this change
potentially breaks applications, partly because the entry wasn't even
in the compatibility-hazard section. Move and clarify.
Discussion: https://postgr.es/m/
603f3f0a-f89d-ae8b-1da9-
a92fac16086d@enterprisedb.com