std: more work on uv tests to endure valgrind's machinations against them

- change port of tcp server test in uv_ll to avoid conflict w/ test in
net::tcp
- a few places the tcp::read fn is used in test w/ a timeout.. suspend
use of the timeout from here on out.

src/libstd/net_tcp.rs

@@ -1424,7 +1424,7 @@ fn run_tcp_test_server(server_ip: str, server_port: uint, resp: str,
                             let sock = result::unwrap(accept_result);
                             log(debug, "SERVER: successfully accepted"+
                                 "connection!");
-                            let received_req_bytes = sock.read(2000u);
+                            let received_req_bytes = sock.read(0u);
                             alt received_req_bytes {
                               result::ok(data) {
                                 server_ch.send(
@@ -1492,7 +1492,7 @@ fn run_tcp_test_server_listener(server_ip: str,
             log(debug, "SERVER: successfully accepted"+
                 "connection!");
             let received_req_bytes =
-                sock.read(2000u);
+                sock.read(0u);
             alt received_req_bytes {
               result::ok(data) {
                 server_ch.send(
@@ -1529,7 +1529,7 @@ fn run_tcp_test_client(server_ip: str, server_port: uint, resp: str,
             let sock = result::unwrap(connect_result);
             let resp_bytes = str::bytes(resp);
             tcp_write_single(sock, resp_bytes);
-            let read_result = sock.read(2000u);
+            let read_result = sock.read(0u);
             if read_result.is_failure() {
                 log(debug, "CLIENT: failure to read");
                 ""

src/libstd/uv_ll.rs

@@ -1280,7 +1280,7 @@ fn impl_uv_tcp_server(server_ip: str,
     fn impl_uv_tcp_server_and_request() unsafe {
         let bind_ip = "0.0.0.0";
         let request_ip = "127.0.0.1";
-        let port = 8888;
+        let port = 8887;
         let kill_server_msg = "does a dog have buddha nature?";
         let server_resp_msg = "mu!";
         let client_port = comm::port::<str>();