See also: https://github.com/stapler/stapler/pull/39

This commit includes several changes to accomodate the above change in Stapler (moving away from 'stapler-class'), as well as to make Jenkins consistently use this same JSON field (moving away from 'kind').

NOTE: Stapler will continue to accept 'stapler-class' for backwards compatibility, and similarly this plugin will continue to pass 'stapler-class' for plugins that have keyed off of it.

[FIXED JENKINS-15252] Explain problems with CSRF protection

The original fix was made in 0c3d6709.
In this fix, I'm also moving the code that creates LeftItem.

It makes no sense that there's Item.cancel(Queue) and Queue.cancel(Item)
and they do different things!

In particular, this includes pull request #39 from Matt that handles
'$class'

Change the javadoc of UpstreamCause to be more accurate...

there is no such mothod getFullDisplayName in a TestObject - only getDisplayName

Change-Id: Idd454be00a22ee3c93f661a3ee3ae322a25c271d

Observed in a test against 1.480:
… hudson.model.Executor run
SEVERE: Unexpected executor death
java.lang.NullPointerException
	at hudson.model.Computer.getNode(Computer.java:473)
	at hudson.slaves.SlaveComputer.getNode(SlaveComputer.java:177)
	at hudson.slaves.SlaveComputer.getRetentionStrategy(SlaveComputer.java:609)
	at hudson.slaves.SlaveComputer.taskCompleted(SlaveComputer.java:285)
	at hudson.model.queue.WorkUnitContext.synchronizeEnd(WorkUnitContext.java:140)
	at hudson.model.Executor.run(Executor.java:253)

Integrating 2.8 to really ensure SSLv2 is off (even when JDK supports
that, and we haven't found any JDKs that do that)

Signed-off-by: NOleg Nenashev <o.v.nenashev@gmail.com>

[FIXED JENKINS-19017] - FileParameter - Handle non-null file parameters as different values

Signed-off-by: NOleg Nenashev <o.v.nenashev@gmail.com>

A truly conforming servlet 3.0 container does not allow us to set "secure cookie" flag beyond ServletContextListener.onInitialized().
If we see that, don't scare the users.

Annotated hudson.model.User methods