Log Message:
kore: update to 4.2.3.

New features:

- Ability to add authenticators to filemaps.
- Python: Add support for CRLs in kore.domain().

Bug fixes:

- The Kore parent process will use the correct exit code if a worker
  process calls fatalx().
- Fix a bug in kore.recvmsg() related to the returned length of the
  ancdata.
- Several bug fixes for concurrency when using Python 3.10.x.

Other changes:

- Removed useless debug messages all across the board.
- Added more format attributes where useful.
- Added KORE_TMPDIR define (default /tmp) for single binary builds.