/etc/aliases removed in 12.0-RELEASE?

[B.J.Scharp]

L.S.,

I'm currently in the process of upgrading my servers to 12.0 RELEASE
(using freebsd-update).

However, on my mailserver I got this message:

---
The following file will be removed, as it no longer exists in
FreeBSD 12.0-RELEASE: /etc/aliases
---

Why was this removed, and what's the replacement? I can't find anything
on this in the release notes.

I use that file quite a lot...

Regards,
Bernard