Two halves of one interface that currently exists in one file only.
The CN was a `let` binding in swarm-bao.nix. Whatever mints the
controller's leaf has to spell it identically, and that lives in another
file, so a literal in one place is an interface with no name. It becomes
`deploy.bao.controllerCommonName` -- under bao because it is a property
of the role this module writes, not a credential belonging to the
controller.
The certificate gets `deploy.swarm-controller.baoClientCertFile` /
`baoClientKeyFile` rather than reusing `deploy.bao.clientCertFile`. That
one means "this host as a reader" and carries the hive's name, while the
controller's policy lets it create roles for every hive; one certificate
serving both would hand that power to whatever else reads the store
here.
Both default to null. The glue that mints the leaf sets them with
`mkDefault`, the same way glue-bao-tls.nix already supplies the reader's
paths -- so the controller module names no path of bao's, and deleting
the glue leaves a controller that takes operator-provided ones.
Nothing reads the new options yet; the minting half is the next commit.
`module-eval`'s derivation is unchanged, which is the honest result for
a change that adds options without altering any asserted value -- it
proves the tree still evaluates, not that anything behaves differently.
a5dc62cecd