fix(rustup): update io import, Writer::write

Make it build with the latest rust-nightly (2015-01-27)

Renamed io import to old_io.
Renamed Writer::write to Writer::write_all

benches/client.rs

@@ -4,7 +4,7 @@ extern crate hyper;
 extern crate test;
 
 use std::fmt;
-use std::io::net::ip::Ipv4Addr;
+use std::old_io::net::ip::Ipv4Addr;
 use hyper::server::{Request, Response, Server};
 use hyper::header::Headers;
 use hyper::Client;
@@ -26,7 +26,7 @@ macro_rules! try_return(
 fn handle(_r: Request, res: Response) {
     static BODY: &'static [u8] = b"Benchmarking hyper vs others!";
     let mut res = try_return!(res.start());
-    try_return!(res.write(BODY));
+    try_return!(res.write_all(BODY));
     try_return!(res.end());
 }
 

benches/client_mock_tcp.rs

@@ -4,8 +4,8 @@ extern crate hyper;
 extern crate test;
 
 use std::fmt;
-use std::io::{IoResult, MemReader};
-use std::io::net::ip::SocketAddr;
+use std::old_io::{IoResult, MemReader};
+use std::old_io::net::ip::SocketAddr;
 
 use hyper::net;
 
@@ -40,7 +40,7 @@ impl Reader for MockStream {
 }
 
 impl Writer for MockStream {
-    fn write(&mut self, _msg: &[u8]) -> IoResult<()> {
+    fn write_all(&mut self, _msg: &[u8]) -> IoResult<()> {
         // we're mocking, what do we care.
         Ok(())
     }

benches/server.rs

@@ -3,7 +3,7 @@ extern crate hyper;
 extern crate test;
 
 use test::Bencher;
-use std::io::net::ip::Ipv4Addr;
+use std::old_io::net::ip::Ipv4Addr;
 
 use hyper::method::Method::Get;
 use hyper::server::{Request, Response};
@@ -17,7 +17,7 @@ fn request(url: hyper::Url) {
 
 fn hyper_handle(_: Request, res: Response) {
     let mut res = res.start().unwrap();
-    res.write(PHRASE).unwrap();
+    res.write_all(PHRASE).unwrap();
     res.end().unwrap();
 }