Capability declarations for Windows (UAP 10.0 and others) are not merged into the resulting package.appxmanifest files of the windows project.
1. cordova create windows-cat-test
2. Add the following entry to config.xml (this snippet would work in a plugin.xml of a cordova plugin):
3. cordova platform add windows
=> The privateNetworkClientServer Capability is not merged into any package.appxmanifest