Fix plugin search over multiple update sites (regression in 2.270). (issue 64840); Restore, as deprecated, the old constructor based on acegisecurity ...

If it doesn't appear in the search results, the credentials that you've chosen may not have read access to it and you'll need to provide different credentials.

Fix plugin dependency resolution. Jenkins will now refuse to load plugins with unsatisfied dependencies, which resulted in difficult to diagnose problems. This ...