* Support `server`, deprecate `backend` in plugin manifest
This lets us converge on the use of the term `server` everywhere instead
of sometimes `backend` and sometimes `server`. We're still using
`webapp` and will eventually support `mobile` as well.
The plan is actually to rip out these deprecations as part of releasing
5.2, but I want to coordinate the extra additional breakage at the same
time, so for now this is a backwards compatible change.
* fix failing tests
* bundled jira plugin
* fix generated file formatting, add prepackaged key
* whoops, uploaded wrong file
* whitelist generated files for license check
* make it work for people without go/bin in their path