Major changes:
* Requires guile 3+
* Merge system-wide Vixie cron updates
* Make vixie cron mode actually work, and work safely
* Give mcron --log option to turn logging on.
* Annotate output with job information.
* documentation: extensive editing of info manual after a note from Paul Vixie.
* Handle nonexistent user home directories.
The project doesn't provide changelog since version 1.2.1
Port update:
* reorder and update Makefile to make linters happy
a1c799b179