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7. Additional Terms.

  "Additional permissions" are terms that supplement the terms of this License
  by making exceptions from one or more of its conditions. Additional
  permissions that are applicable to the entire Program shall be treated as
  though they were included in this License, to the extent that they are valid
  under applicable law. If additional permissions apply only to part of the
  Program, that part may be used separately under those permissions, but the
  entire Program remains governed by this License without regard to the
  additional permissions.

  When you convey a copy of a covered work, you may at your option remove any
  additional permissions from that copy, or from any part of it. (Additional
  permissions may be written to require their own removal in certain cases
  when you modify the work.) You may place additional permissions on material,
  added by you to a covered work, for which you have or can give appropriate
  copyright permission.

  Notwithstanding any other provision of this License, for material you add to
  a covered work, you may (if authorized by the copyright holders of that
  material) supplement the terms of this License with terms:
  a) Disclaiming warranty or limiting liability differently from the terms of
     sections 15 and 16 of this License; or
  b) Requiring preservation of specified reasonable legal notices or author
     attributions in that material or in the Appropriate Legal Notices
     displayed by works containing it; or
  c) Prohibiting misrepresentation of the origin of that material, or
     requiring that modified versions of such material be marked in reasonable
     ways as different from the original version; or
  d) Limiting the use for publicity purposes of names of licensors or authors
     of the material; or
  e) Declining to grant rights under trademark law for use of some trade
     names, trademarks, or service marks; or
  f) Requiring indemnification of licensors and authors of that material by
     anyone who conveys the material (or modified versions of it) with
     contractual assumptions of liability to the recipient, for any liability
     that these contractual assumptions directly impose on those licensors and
     authors.

  All other non-permissive additional terms are considered "further
  restrictions" within the meaning of section 10. If the Program as you
  received it, or any part of it, contains a notice stating that it is
  governed by this License along with a term that is a further restriction,
  you may remove that term. If a license document contains a further
  restriction but permits relicensing or conveying under this License, you may
  add to a covered work material governed by the terms of that license
  document, provided that the further restriction does not survive such
  relicensing or conveying.

  If you add terms to a covered work in accord with this section, you must
  place, in the relevant source files, a statement of the additional terms
  that apply to those files, or a notice indicating where to find the
  applicable terms.

  Additional terms, permissive or non-permissive, may be stated in the form of
  a separately written license, or stated as exceptions; the above
  requirements apply either way.

8. Termination.

  You may not propagate or modify a covered work except as expressly provided
  under this License. Any attempt otherwise to propagate or modify it is void,
  and will automatically terminate your rights under this License (including
  any patent licenses granted under the third paragraph of section 11).

  However, if you cease all violation of this License, then your license from
  a particular copyright holder is reinstated
  (a) provisionally, unless and until the copyright holder explicitly and
      finally terminates your license, and
  (b) permanently, if the copyright holder fails to notify you of the
      violation by some reasonable means prior to 60 days after the cessation.

  Moreover, your license from a particular copyright holder is reinstated
  permanently if the copyright holder notifies you of the violation by some
  reasonable means, this is the first time you have received notice of
  violation of this License (for any work) from that copyright holder, and you
  cure the violation prior to 30 days after your receipt of the notice.

  Termination of your rights under this section does not terminate the
  licenses of parties who have received copies or rights from you under this
  License. If your rights have been terminated and not permanently reinstated,
  you do not qualify to receive new licenses for the same material under
  section 10.

9. Acceptance Not Required for Having Copies.

  You are not required to accept this License in order to receive or run a
  copy of the Program. Ancillary propagation of a covered work occurring
  solely as a consequence of using peer-to-peer transmission to receive a copy
  likewise does not require acceptance. However, nothing other than this
  License grants you permission to propagate or modify any covered work. These
  actions infringe copyright if you do not accept this License. Therefore, by
  modifying or propagating a covered work, you indicate your acceptance of
  this License to do so.

10. Automatic Licensing of Downstream Recipients.

  Each time you convey a covered work, the recipient automatically receives a
  license from the original licensors, to run, modify and propagate that work,
  subject to this License. You are not responsible for enforcing compliance by
  third parties with this License.

  An "entity transaction" is a transaction transferring control of an
  organization, or substantially all assets of one, or subdividing an
  organization, or merging organizations. If propagation of a covered work
  results from an entity transaction, each party to that transaction who
  receives a copy of the work also receives whatever licenses to the work the
  party's predecessor in interest had or could give under the previous
  paragraph, plus a right to possession of the Corresponding Source of the
  work from the predecessor in interest, if the predecessor has it or can get
  it with reasonable efforts.

  You may not impose any further restrictions on the exercise of the rights
  granted or affirmed under this License. For example, you may not impose a
  license fee, royalty, or other charge for exercise of rights granted under
  this License, and you may not initiate litigation (including a cross-claim
  or counterclaim in a lawsuit) alleging that any patent claim is infringed by
  making, using, selling, offering for sale, or importing the Program or any
  portion of it.

11. Patents.