/usr/share/kde4/config/kdm.knsrc is in kdm 4:4.11.13-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | [KNewStuff3]
ProvidersUrl=http://download.kde.org/ocs/providers.xml
Categories=KDM4 Theme
TargetDir=kdm/themes/
Scope=system
# unpack the downloaded archive
Uncompress=always
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