Needed to resurrect validation, too.
Merge branch 'rc'
[FIXED JENKINS-15889] Saving the update center list after the metadata has been fetched results in the metadata being persisted twice
[FIXED JENKINS-15487] Override put() method in RunMap

Implementation according to Jesse Glick's comments on the issue.
[FIXED JENKINS-15567]

Fixed typo in sample command line args.
Add list-plugins command
Align column widths
Comment.
Merge branch 'master' of github.com:jenkinsci/jenkins
Reworked UnprotectedRootAction display to be in configure page for better discoverability and possibility of support from reverse-proxy-auth-plugin.
Remote class loading statistics.
[JENKINS-12235] root cause is hidden by by script deletion failure
this isn't meant to be persisted
fixed the backward compatibility stuff
1.4 released
Merge branch 'rc'
display name is for UI, and can change based on the current users' locale. Better to use ID.
improved SSH usage compatibility
improved CLI usage compatibility
Added a CLI command to report console output