Function base64 

pub fn base64(bytes: &[u8]) -> String

Standard base64, for the one digest the policy names. Four characters per three bytes, padded; no dependency for twenty lines.

use majordomus_cli::cockpit::base64;
assert_eq!(base64(b""), "");
assert_eq!(base64(b"f"), "Zg==");
assert_eq!(base64(b"fo"), "Zm8=");
assert_eq!(base64(b"foo"), "Zm9v");
assert_eq!(base64(b"foobar"), "Zm9vYmFy");