merged back the RC branch
Use proper array lenght

See PR #1233 and discussion therein.
[JENKINS-22967] Polish new api
Merge branch 'JENKINS-22028' of github.com:daniel-beck/jenkins
[JENKINS-22028] Noting merge of #1235.
Merge branch 'JENKINS-22867' of github.com:daniel-beck/jenkins
[JENKINS-22867] Noting merge of #1232.
creating an RC branch
the trunk is toward 1.565-SNAPSHOT
Merge branch 'master' of github.com:jenkinsci/jenkins
Follow-up on JENKINS-22867

Added missing target attributes to links and fixed some apostrophes.
Also incorporated jglick's suggestions on quoting with '{'.
[FIXED JENKINS-22982] Copy-Paste Errors in German Translation Resource
for LogRotator
Added nullability annotations to getComputer.
[FIXED JENKINS-22938] SSH slave connections die after the slave outputs 4MB of stderr, usually during findbugs analysis
Adding some nullness annotations related to Job.getEnvironment.
Cf.: https://github.com/jenkinsci/subversion-plugin/pull/83
[JENKINS-22967] Make DirectlyModifiableView an interface rather than class
[FIX JENKINS-23041] Fix systemInfo for offline slaves

- Don't show link in sidebar
- Make systemInfo page more robust when accessed via URL
Use logging API correctly and introduce the ability to differentiate between the logging level for task execution taking too long
Merge pull request #1215 from MadsNielsen/JENKINS-21394-Regression

Fixing JENKINS-22750, regression introduced in JENKINS-21394
Noting #1215