Add HTTP/1.0 support and simplify persistent connections handling

tests/standalone/src/io/HttpClientTest.dart

Index: tests/standalone/src/io/HttpClientTest.dart
diff --git a/tests/standalone/src/io/HttpClientTest.dart b/tests/standalone/src/io/HttpClientTest.dart
index ddb333eeb228ec8a4f37f7762b39f801208d0c52..c2f90c2cecbe7f428cffdfbed450d7f70abfd020 100644
--- a/tests/standalone/src/io/HttpClientTest.dart
+++ b/tests/standalone/src/io/HttpClientTest.dart
@@ -11,7 +11,6 @@ void testGoogle() {
   var conn = client.get('www.google.com', 80, '/');
 
   conn.onRequest = (HttpClientRequest request) {
-    request.keepAlive = false;

[Anders Johnsen, 2012/04/13 09:02:38]

Since you have changed keepAlive to be on by default, should we do something
else in this test?

[Søren Gjesse, 2012/04/13 10:58:31]

I don't think so. I don't even know why it was here in the first place.

     request.outputStream.close();
   };
   conn.onResponse = (HttpClientResponse response) {
@@ -33,7 +32,6 @@ void testGoogleUrl() {
     var conn = client.getUrl(new Uri.fromString(url));
 
     conn.onRequest = (HttpClientRequest request) {
-      request.keepAlive = false;
       request.outputStream.close();
     };
     conn.onResponse = (HttpClientResponse response) {