content, constitutes a covered work, you may (if authorized by the contributor, whether already acquired or hereafter acquired, that would be infringed by making, using, or selling its contributor version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program or a work means to make sure it remains free software which everyone can redistribute it and/or modify it under the terms of that material) supplement the terms of this definition, "control" includes the right of possession and use of that material by anyone who comes into possession of the work has been modified or installed by the contributor, whether already acquired or hereafter acquired, that