Improve version string.

util/Cargo.toml

@@ -28,3 +28,4 @@ sha3 = { path = "sha3" }
 serde = "0.6.7"
 clippy = "0.0.37"
 json-tests = { path = "json-tests" }
+target_info = "0.1.0"

util/src/lib.rs

@@ -34,6 +34,7 @@
 //!   sudo make install
 //!   ```
 
+extern crate target_info;
 extern crate slab;
 extern crate rustc_serialize;
 extern crate mio;

util/src/network/host.rs

@@ -7,6 +7,7 @@ use std::ops::*;
 use mio::*;
 use mio::tcp::*;
 use mio::udp::*;
+use target_info::Target;
 use hash::*;
 use crypto::*;
 use sha3::Hashable;
@@ -280,7 +281,7 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 				config: config,
 				nonce: H256::random(),
 				protocol_version: 4,
-				client_version: "parity".to_owned(),
+				client_version: format!("Parity/{}/{}-{}-{}", env!("CARGO_PKG_VERSION"), Target::arch(), Target::env(), Target::os()),
 				listen_port: 0,
 				capabilities: Vec::new(),
 			}),