secretVolumeMount from k8s-libsonnet hardcodes the volume name to secret name

[davidovich]

If the secret has a valid name with dots in it (my-cluster.example.com) you will not be able to use the secretVolumeMount because it uses the secret name as a volume name where dots are not allowed.

We could:

• Allow overriding the volumeName,
• sanitize the volume name (removing the dots) before naming the volume.

[Duologic]

I wrote a small function that can sanitize it here: https://github.com/jsonnet-libs/xtd/blob/master/docs/ascii.md#fn-stringtorfc1123