Be quiet

[JENKINS-33546] [JENKINS-33605] Back to Stapler 1.239

Add the .mvn directory and set default Xmx value

Fix typo in hudson/tools/label.jelly

Using the new feature introduced in Maven 3.3.1.
See
https://maven.apache.org/docs/3.3.1/release-notes.html#JVM_and_Command_Line_Options
for more details.

Possibly a long term better solution/first encounter for newcomers. When
people can't build Jenkins because of wrong default memory settings.
Like https://goo.gl/Co9kye

The "Xmx800m" was chosen after looking at last successful ci.j.o builds.
Max memory displayed by Maven being ~730MB. So putting 800 to leave the
build some room so that the GC has less chance to have to chime in too
often.

Make Fingerprint's XSTREAM field public

[FIX WEBSITE-147] Make changelog ratings work on jenkins.io

[FIX WEBSITE-147]

Some plugins needs to register compatibility alias etc for
their FingerprintFacets.

[FIXED JENKINS-33693] Do not hardcode .bat extension.

This reverts commit 0d0d2a9c.

[FIXED JENKINS-33681] Plugin filters were failing to be removed and blocking restart

[JENKINS-33467] Clarifying that CauseAction.getCauses is immutable

As the default maven command is on the path we can not hard code the
command to mvn.bat as since maven 3.something it has been mvn.cmd

As this is on the path we can just use mvn and let Windows do its thing
with PATHEXT which will has both .BAT and .CMD by default.

This fixes ATH failures when the ATH is run on windows.

[INFRA-588] Upgrade + Remove inherited values

See
https://github.com/jenkinsci/pom/commit/4518f1577489d7a7fd91c0213ab708defb77a67f

effective-pom diff between & after this change:

    $ diff before.xml after.xml
    7c7
    <     <version>1.35</version>
    ---
    >     <version>1.36</version>
    85c85
    <       <url>http://maven.jenkins-ci.org:8081/content/repositories/releases</url>
    ---
    >       <url>https://repo.jenkins-ci.org/releases/</url>
    89c89
    <       <url>http://maven.jenkins-ci.org:8081/content/repositories/snapshots</url>
    ---
    >       <url>https://repo.jenkins-ci.org/snapshots/</url>

Add a title for the confusing 'Use browser' option

Set a smaller font on metadata in log

[FIXED JENKINS-33395] install an uncaught exception handler

[FIXED JENKINS-32831] do not fail if there are no metadata for tool installers

[JENKINS-18032] Fix Delete Project from context menu when using CSRF defense