schema: Allow scDomain and scOpsDomain to be empty strings

They default to the empty string. Templates fail to render if the fields
are omitted entirely. Thus this compromise.

Author: Zash

config/schemas/config.yaml

@@ -74,11 +74,15 @@ properties:
       scDomain:
         description: If baseDomain for wc and sc are not the same, set the domain of the sc cluster.
         type: string
-        format: hostname
+        oneOf: # Templates do not handle missing values so they must be empty strings to disable. Future FIXME?
+          - const: ""
+          - format: hostname
       scOpsDomain:
         description: If baseDomain for wc and sc are not the same, set the domain of the sc cluster.
         type: string
-        format: hostname
+        oneOf:
+          - const: ""
+          - format: hostname
       issuer:
         description: |-
           Default cert-manager issuer to use for issuing certificates for ingresses.