There is an updated pull request by classabbyamp against master on the void-packages repository

https://github.com/classabbyamp/void-packages portal-conf
https://github.com/void-linux/void-packages/pull/46449

xdg-desktop-portal: include a default portals.conf
Without this, `xdg-desktop-portal` cannot do anything as of 1.18.0. DEs and WMs should probably ship their own if they want to use a specific frontend, but this should be good enough for now.

This conf file is put in the lowest precedence location, and generic `portals.conf` is overriden if `XDG_CURRENT_DESKTOP-portals.conf` is found, so this should be fairly safe.

Additionally, this `portals.conf` does not require any specific frontend, just the special value `*`, which means the first one found in lexicographical order.

See [portals.conf(5)](https://github.com/flatpak/xdg-desktop-portal/blob/main/doc/portals-conf.rst) for more details. This manpage is also installed now by adding `python3-docutils` to `hostmakedepends`.

fixes #46317

<!-- Uncomment relevant sections and delete options which are not applicable -->

#### Testing the changes
- I tested the changes in this PR: **YES**



A patch file from https://github.com/void-linux/void-packages/pull/46449.patch is attached