MIME::Decoder::Gzip64(3pm) on Linux
The text 4c80df29f19b, as Debian 11 (Bullseye), Debian 10 (Buster) shipped it.
decode a "base64" gzip stream
The text 4c80df29f19b, as Debian 11 (Bullseye), Debian 10 (Buster) shipped it.
decode a "base64" gzip stream