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* The following two backends are supported by duplicity itself,         *
* but will require manual installation of their respective dependencies *
* because they are not yet available in the ports tree:                 *
*                                                                       *
*   - The GIO backend.                                                  *
*   - The HSI backend.                                                  *
*   - The tahoe backend for Tahoe-LAFS.                                 *
*   - The U1 backend for Ubuntu One cloud storage                       *
*                                                                       *
* Please refer to upstream duplicity documentation for information on   *
* the use of these backends.                                            *
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