When starting the jenkins.war directly, properly check for Java 8 as minimum instead of Java 7 before proceeding.
(issue 44764)
Allow overriding the Jenkins session ID suffix so it doesn't change on every restart, possibly resulting in too many cookies.
(how to set session ID, issue 25046, issue 44894)
Fix resource loading in plugins using the PluginFirstClassLoader, e.g. loading Groovy classes from plugin resources.
(issue 44898)
Prevent possible NullPointerException when listing remote directories using the FilePath#list() and FilePath#listDirectories() APIs.
(issue 44942)