Improve JQL linkedIssues function by adding wildcard search

It would be great if JQL could be improved to support wild card search in linkedIssues(issuekey, linktype) so you could search by project key. I.E. linkedissues("key-*").

Currently I just need a result set for all issues that have a linked issue of type "Duplicates". So perhaps just passing in the linktype with an empty value for issuekey would be an easier implementation. Or perhaps creating a new function that does this shouldn't be a difficult task.

This will also allow a filter to be created so users can search for issues that do not have linked issues i.e project = "project" and issue not in filter(in linkedissues("key-*"))