/etc/xdg/korganizer.knsrc is in korganizer 4:16.04.3-4~deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [KNewStuff3]
ProvidersUrl=http://download.kde.org/khotnewstuff/korganizercalenders-providers.xml
TargetDir=korganizer
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