Support auto-merging

I would like to be able to configure server-side auto-merging on a per-branch basis.  For instance if I have the following branches:

Foo
FooB
FooC

Any MR merged into Foo, I want to automatically merge into FooB, and then that merge cascade into FooC.

If there were a setting where I could say:

Auto-forwarding branches:
Foo -> FooB
FooB -> FooC

And Bitbucket would take care of it.

If the merge can’t be done without conflict, it would be cool to create a MR and assign it to whoever submitted the initial merge that triggered the auto-forward.

I noticed that Bitbucket claims to have automatic merging, but it is too limiting since your branches have to be named in a particular way that would not make sense for our development environment.