/usr/share/doc/libmatthew-java-doc/api/cx/ is in libmatthew-java-doc 0.7.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libmatthew-java-doc/api/cx/ath/
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/CGI.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/CGIErrorHandler.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/CGIHeaderSentException.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/CGIInvalidContentFormatException.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/CheckBox.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/DefaultErrorHandler.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/DisplayField.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/DropDown.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/Field.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/HTMLForm.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/HiddenField.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/MultipleDropDown.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/NewTable.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/Password.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/Radio.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/SubmitButton.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/TextArea.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/TextField.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/package-frame.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/package-summary.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/cgi/package-tree.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/debug/
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/debug/Debug.FilterCommand.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/debug/Debug.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/debug/package-frame.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/debug/package-summary.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/debug/package-tree.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/io/
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/io/DOMPrinter.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/io/ExecInputStream.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/io/ExecOutputStream.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/io/InOutCopier.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/io/TeeInputStream.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/io/TeeOutputStream.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/io/package-frame.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/io/package-summary.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/io/package-tree.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/NotConnectedException.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/USInputStream.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/USOutputStream.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/UnixIOException.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/UnixServerSocket.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/UnixSocket.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/UnixSocketAddress.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/package-frame.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/package-summary.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/package-tree.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/testclient.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/unix/testserver.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/utils/
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/utils/Hexdump.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/utils/package-frame.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/utils/package-summary.html
/usr/share/doc/libmatthew-java-doc/api/cx/ath/matthew/utils/package-tree.html