* gnu/packages/pv.scm (pv): Update to 1.6.6.
* gnu/packages/pv.scm (pv)[source, home-page]: Use HTTPS.
* gnu/package/pv.scm (pv): New file. * gnu-system.am (GNU_SYSTEM_MODULES): Add it. Signed-off-by: Alex Kost <alezost@gmail.com>