Version 255.4-r2 Bug Fix Release

This is a second bug-fix release.

Many thanks to all testers and reporters!

Changes and Additions

• Makefile: Enhance the flexibility of the configuration.

Fixed Bugs

• meson: fix handling of libexecdir option (#281)
• update-utmp: Fix compilation error with disabled audit support (#278)
• logind-core: Fix loading of logind.conf and logind.conf.d (#279)