gplv3 public-domain pd gpl3 mgm rdoc-lang rdoc-language pdnet pdnet-plus-plus pdsnet public-domain-streaming-network public-domain-streaming-network-plus public-domain-streaming-network-plus-plus pdnet-plus-plus-channels pdnet-plus-plus-docs pdnet-plus-plus-documentation pdnet-plus-plus-channels-docs copyright-free public-domain-streaming pdnet-plus-plus-channels-documentation