New issue by datenwolf on void-packages repository

https://github.com/void-linux/void-packages/issues/36208

Description:
### System

* xuname:  Void 5.15.28_1 x86_64 GenuineIntel notuptodate rrrrrmmdnFFFFF
* package:  xscreensaver-6.03_1

### Expected behavior
Package contains the `xscreensaver-systemd`, that must be run as part of the X11 session in order to react to elogind events for automatic locking.

### Actual behavior
Package lacks this utility

### Steps to reproduce the behavior
Install package, configure `xscreensaver` as locking tool, attempt to start `xscreensaver-systemd` utility alongside.

### Suggestion
Add a package `xscreensaver-elogind` containing that utility, so that no hard dependency on `elogind` is created by the main package.