Changelog for 2.261

What's new in 2.261 (2020-10-13)

• Fix docker build agent provisioning (regression in 2.259-260). (issue 63828)
• Fix extensions footer location (regression in 2.230). (issue 63798)
• Introduce LowResourceMonitor from Jetty by upgrading to Winstone 5.11. Bump jetty.version from 9.4.30.v20200611 to 9.4.32.v20200930. (pull 4975, Winstone 5.11 changelog, Jetty 9.4.31.v20200723 changelog, Jetty 9.4.32.v20200930 changelog)
• SSHD module 2.7: Remove deprecated key exchange and MAC algorithms. (pull 4951, SSHD module 2.7 changelog)
• SSHD module 2.7: Allow configuring disabled key exchange and MAC algorithms through system properties. (pull 4951, SSHD module 2.7 changelog)
• Reduce memory consumption when loading classes from plugins. (pull 4957)
• Do not render parts of a serialized ConsoleNote in truncated log output. (pull 4905)
• Replace "slave" reference with "agent" in Traditional Chinese translation. (issue 62347)
• Use 'Agent to controller' to describe agent access control system rather than 'agent to master'. (issue 63905)
• Hide description panel in sidebar if historyWidget.descriptionLimit is 0. (pull 4978)
• Developer: Pluggable Artifact Storage: Make the VirtualFile API generally available to plugin developers. (pull 4974, JEP-202)
• Developer: Allow omitting ClassNotFoundException in AntClassLoader and ClassicPluginStrategy. (pull 4957)
• Internal: Update slf4j-api from 1.7.26 to 1.7.30. (pull 4988, SLF4J changelog)
• Internal: Update parent pom. Updates various maven plugins and developer tools. (pull 4982, Parent pom 1.58 changelog)