luci-app-https-dns-proxy: bugfix: OpenDNS family filter URL update
* bugfix: update OpenDNS family filter URL
* update copyright/license
* update PKG_RELEASE to avoid double `r` on snapshots
* add LUCI_URL to upstream repository
* update README URL to upstream documentation
* update pkg.URL property to allow linking to a specific version of README
* remove duplicates of pkg object from overview.js/status include js files
Signed-off-by: Stan Grishin <[email protected]>
(cherry picked from commit
9c836d14734f069421a459a63436d07cc91dd760)