Proposal:
when configuring the upgrade graph for v4.y.z, always enable a direct:
v4.y-1.k (where k is the latest released) -> v4.y.z

currently in general we have only:
v4.y-1.k -> v4.y.0 -> v4.y.1 ... -> v4.y.z

Benefits:

• a short upgrade path for customers
• the customer will not risk to re-encounter on v4.y.0 bugs and security issues he already got a fix for on v4.y-1.k

Risks:

• the impact on the test matrix