A lyrics and chords formatting program

Changes for 6.042 - 2024-01-09

• !This is a bugfix release.
• !Important
• To trace problems, the ChordPro 'about' information is included in the PDF. This should not reveal sensitive information, but in case this bothers you, you can disable this by setting debug.runtimeinfo to 0 in the config.
• !Functionality
• Report XDG_CONFIG_HOME in runtime info.
• Include 'about' info as PDF metadata.
• !Bug fixes
• Post-release typo fixes.
• (Stringdiagram) Fix font size of base fret numeral (issue 337).
• (Stringdiagram) Fix fret number colours.
• Fix handling of XDG_CONFIG_HOME.
• Fix 'spread' images.
• Fix problem finding notes:german et al.
• (MMA) Fix test fail with perl >= 5.39.6.