/usr/lib/tmpfiles.d/openvpn.conf is in openvpn 2.4.4-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | d /run/openvpn-client 0710 root root -
d /run/openvpn-server 0710 root root -
d /run/openvpn 0755 root root - -
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