+ * @var string[] List of wiki DB domain IDs; the format of each ID consist of 1-3 hyphen
+ * delimited alphanumeric components (each with no hyphens nor spaces) of any of the forms:
+ * - "<DB NAME>-<DB SCHEMA>-<TABLE PREFIX>"
+ * - "<DB NAME>-<TABLE PREFIX>"
+ * - "<DB NAME>"
+ * If hyphens appear in any of the components, then the domain ID parsing may not work
+ * in all cases and site functionality might be affected. If the schema ($wgDBmwschema)
+ * is left to the default "mediawiki" for all wikis, then the schema should be omitted
+ * from these IDs.