How works .sync-exclude.lst?
There's no relevant documentation nor on Owncloud and Nextcloud on the usage of .sync-exclude.lst file (https://github.com/nextcloud/desktop/issues/2917).
They can be placed in every synced folder (https://github.com/nextcloud/desktop/pull/1374) but the overloading rules are not clear (https://github.com/nextcloud/desktop/issues/1636).
And the syntax is not clear: