WebHook does no validation of the `revision` values

[vagababov]

Expected Behavior

you put junk into revisions list your request is rejected.

Actual Behavior

anything is accepted.

Steps to Reproduce the Problem

1. carve a release more service
2. set revisions to whatever you want
3. apply and get the service accepted.

Additional Info

We should verify at least that the revision strings match k8s resource name format (insofar

[vagababov]

/milestone Serving 0.4

[knative-prow-robot]

@vagababov: You must be a member of the knative/knative-milestone-maintainers github team to set the milestone.

Details

In response to this:

/milestone Serving 0.4

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[vagababov]

/assign