Add a section to README for issues with ETags

This commit adds a section in the README.md describing common issues with ETags

Signed-off-by: Enrico <Enrico204@users.noreply.github.com>
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Enrico 2022-08-18 11:28:42 +02:00 committed by GitHub
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@ -34,6 +34,14 @@ Then open the Tasks app from the app menu.
* [Kalendar](https://apps.kde.org/kalendar/) (Linux)
## ETag (or: problem with non-existing conflicts)
This app uses `ETag` HTTP header to work properly (mostly for detecting conflicts). If `ETag`s are modified or removed, the app will report non-existing conflicts.
Some anti-tracking client side extensions are known to remove/replace `ETag` header to avoid tracking via cache (e.g., [CleanURLs is known to create problems](https://github.com/nextcloud/tasks/issues/2077)). You'll need to add an exception for NC Tasks.
Also, `ETag` may be modified by a server-side configuration. If you manage your server you'll need to change its configuration (see https://github.com/nextcloud/tasks/issues/167).
## Maintainers
[Raimund Schlüßler](https://github.com/raimund-schluessler) [and many more](https://github.com/nextcloud/tasks/graphs/contributors)