/usr/lib/tmpfiles.d/ejabberd.conf is in ejabberd 16.09-4.
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 | # Create /run/ejabberd before ejabberd starts
# See tmpfiles.d(5) for details
d /run/ejabberd 0755 ejabberd ejabberd -
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