[JENKINS-15533] testing if the lazy loading can gracefully tolerate a RuntimeException during unmarshalling.

At least in the current version this working as expected
[FIXED JENKINS-8713]  Display test skipped messages in test results
[FIXED JENKINS-15583]

Report 100 recent builds in the JSON API, including in-progress builds.

Not reporting all the builds since this would nullify the lazy loading
effect. Will introduce a pagenation API that supports retrieval.
Merge branch 'master' of https://github.com/jenkinsci/jenkins
[JENKINS-8713]  Add changelog entry
doc improvement
added a test case concerning a single extension implementing multiple extension points
[JENKINS-16089] needs a separator here

And since it's now a symlink that points to another symlink that then
points to the real stuff, we need recursive onion peeling.
Removing obsolete comment.
[FIXED JENKINS-3265]

Made the in-flight build survive the reload from the disk.
Remove redundant space in sentence.
Align LabelAxis help document with config.jelly.