virtualbox source: license-problem-non-free-RFC doc/manual/en_US/dita/topics/licensing/vbox-base/licensing-license-vbox-base-glibc-2.17-326.0.9.el7_9.dita
virtualbox source: license-problem-non-free-RFC doc/manual/en_US/dita/topics/licensing/vbox-ext/licensing-license-vbox-ext-glibc-2.17-326.0.9.el7_9.dita
