Use a ping timeout of 3/4 of the ping interval instead of the default
4 minute timeout.
This happens to workaround an issue in the remoting PingThread
implementation which causes the ping to busy wait for the timeout
period instead of keeping the channel alive.

Fixed JENKINS-13129: Updating built-in plugins doesn't work, the file doesn't get pinned and is overwritten on the next startup

[FIX JENKINS-12994] Quiet period is blocking other jobs in queue

Added another hyperlink to the console output of a blocked matrix build configuration.
thanks

There's some expected performance gain since people often deploy
$JENKINS_HOME over NFS.

Queue#maintain() was returning too soon

[Fixed JENKINS-13129] Updating built-in plugins doesn't work, the file doesn't get pinned and is overwritten on the next startup

changed bundled plugin detection, added unit test

- Added check if running on windows to copy the web dir of the
  WebAppContext

icons after build completion.

Fix for [JENKINS-13195]