Changelog for 2.253

What's new in 2.253 (2020-08-18)

• Major update of the Alpine-based Jenkins Docker image. Jenkins Docker image for Alpine now uses Alpine 3.12 and AdoptOpenJDK 8u262. (LTS upgrade guide)
• Fix button that copies API token to clipboard (regression in 2.238). (issue 63274)
• Fix a deadlock in agent logging. (issue 63082)
• Fix Cmd + Enter not running the script in the Script Console on a Mac (regression in 2.248). (issue 63342)
• Fix backspace key sometimes did not delete text from the Script Console on a Mac (regression in 2.248). (issue 63342)
• Fix regular expression validator UI location (regression in 2.244). (issue 63308)
• Make alert colors consistent with 'Manage Jenkins' alert colors. (issue 63330)
• Add Japanese translations for user configuration screen. (pull 4904)
• Prevent concurrent build deletion. (issue 61687)
• Developer: Make unavailable plugin background themeable. (issue 63331)
• Developer: Expose fingerprint range set serialization methods for plugins. (pull 4888)
• Internal: Remove some text messages from Jenkins core which had already been moved to the LDAP and PAM Authentication plugins. Be sure to upgrade to LDAP 1.22 or newer and PAM Authentication 1.5 or newer. (pull 4866)
• Internal: Remove deprecated and unused ProcessTreeKiller class. (pull 4874)
• Internal: Exclude JUnit and Hamcrest libraries from the jenkins.war bundle. (issue 63269)