With the maven-hpi-plugin version 3.6, one can see that the url tag (now used to link documentation) is not having its string properly interpolated.
As an example this pom will result in `https://github.com/jenkinsci/$%7Bproject.artifactId%7D-plugin` in the update center.
CC Jesse Glick, looks like we need to remove it from guidelines. Something does not work in the release profile
To be fair the documentation (https://wiki.jenkins.io/display/JENKINS/Hosting+Plugins#HostingPlugins-Hostingthepluginpage ) states: "Modify your project URL to point to the GitHub repository, e.g. http://github.com/jenkinsci/your-plugin", it was simply making sense to use the artifactid variable.
And the archetype now does the same.
Something does not add up here. https://github.com/jenkinsci/chaos-monkey-plugin/blob/chaos-monkey-0.1/pom.xml#L43 is correctly expanded in http://repo.jenkins-ci.org/public/io/jenkins/plugins/chaos-monkey/0.1/chaos-monkey-0.1.hpi so what else is the update center generator pulling metadata from?