Support for wildcards or maybe even regular expressions in the database/collection name of a permission for a custom role.

We have a multi tennant setup, by storing every customer's data in its own database on the cluster. The applications we build span those databases, but every application has it's own permissions on a collection name bases.

instead of granting "find" permission to the "products" collection of all databases like "mongodbcom" and "somecompanycom", it would be nice if we coulf configure it like "find" permission to the "products" collection on the database matching /^[a-z]+_[a-z]+$/