Log Message:
Update to 20230101. From the changelog:

20230101:
- removed duplicit crypto_scalarmult_curve25519.* implementation and
  used X25519 from bearssl library
- randombytes: rollback to /dev/urandom variant only
- Makefile: removed bearssl target

20221229:
- fixed parallel build

20221227:
- LICENCE updated from public-domain to CC0
- updated examples and linked examples.md from README.md
- added more error log messages when proxy-protocol is used