apdev-2023

Since this pull-request has been abandoned for 5 months and gone stale, I have continued the original author's work and made a new pull request: https://github.com/openwrt/openwrt/pull/13030

> I have the error "couldnt update placeholder info" today after the update to 4.0.3 on Windows. I have to nextcloud-instances connected, on different nextcloud-versions, for both I am getting...