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

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

[FIXED JENKINS-25400] Rework fix of JENKINS-22769 (c04cdcd9) to put the burden on each listener to impersonate ACL.SYSTEM if it needs to.

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!

Signed-off-by: Oleg 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.

Integrated the new winstone.jar for 1.585

The commit message cannot really stand alone.

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

These items are meant for 1.584

Integrated the trilead with SecureRandom instantiation fix.

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

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

Integrated the newer version of Winstone

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

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

[FIXED JENKINS-25074] Make sure to call Job.getBuildHealthReports just once per t:buildHealth render.

Based on the reaction to these issues and JENKINS-24514, I'm partially
reverting the original change, and bringing the umask default back to
022.

The configurable option does enable the user to choose a different
umask, so I think I can still claim that JENKINS-24514 is addressed.