Added a restriction for IANA domain zones. Users cannot mine them from now on.

src/lib.rs

@@ -8,6 +8,7 @@ pub use crate::p2p::Network;
 pub use crate::settings::Settings;
 pub use crate::bytes::Bytes;
 pub use crate::keys::Keystore;
+pub use crate::iana::Iana;
 pub use crate::simplebus::*;
 pub use crate::utils::*;
 
@@ -23,4 +24,5 @@ pub mod dns;
 pub mod dns_utils;
 pub mod settings;
 pub mod bytes;
+pub mod iana;