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: Oleg Nenashev <o.v.nenashev@gmail.com>

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

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.

Annotated hudson.model.User methods

Changed wording for command line message.

Updating javadoc after struggling to add action to nodes

- If there are any files in `$JENKINS_HOME/update-center-rootCAs` that are not ending in `.txt` and are
  not valid certificates, do not blow up the entire certificate checking (and hence the ability to see updates
  or tool installers) but rather ignore those files and warn the user that the file should not be there.
  The correct thing to do is only use as trusted certificates those certificates that parse.

- Also fix resource leak

Updating the number of provided plugins.

Integrated the new winstone.jar for 1.585

The fix also includes comments in #1424 regarding Nonnull usage

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

The goals is to maintain the information about the provided plugins near to the one showed on jenkins-ci.org home.

Up to b5843f3b, <t:ballColorTd> supported @iconSize="16x16" and so on that controls the color.
In the new scheme, it needs to be translated to iconSizeClass

The commit message cannot really stand alone.

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

[FIXED JENKINS-3539] Prevent empty file creation if left empty

Conflicts:
	test/src/test/java/hudson/model/ParametersTest.java

It assumed it was used only inside config-scm.jelly, so assumed it could use ${scmd}
rather than the more standard ${descriptor}.

When a server error is caught by applyErrorMessage (“ERROR” link), do not render the whole oops.jelly page.
Just pick out the <div id="error-description"> from JENKINS-20772.