[System] Try to fix Cookies tests

The first part was to try to repro the ordering behavior of MS which seems to be based on the string length of, first, the domain and, then, the path.
Second part was to fix the .local unit test with Dns.GetHostname as some OS (namely Mac) append a '.local' by default to the hostname.

mcs/class/System/System.Net/CookieCollection.cs

@@ -49,11 +49,12 @@ namespace System.Net
 			{
 				if (x == null || y == null)
 					return 0;
-				
-				int c1 = x.Name.Length + x.Value.Length;
-				int c2 = y.Name.Length + y.Value.Length;
 
-				return (c1 - c2);
+				var ydomain = y.Domain.Length - (y.Domain[0] == '.' ? 1 : 0);
+				var xdomain = x.Domain.Length - (x.Domain[0] == '.' ? 1 : 0);
+
+				int result = ydomain - xdomain;
+				return result == 0 ? y.Path.Length - x.Path.Length : result;
 			}
 		}
 

mcs/class/System/Test/System.Net/CookieContainerTest.cs

@@ -768,6 +768,7 @@ namespace MonoTests.System.Net {
 		[Test]
 		public void GetCookieHeader4 ()
 		{
+			Console.WriteLine ("CookieHeader4");
 			CookieContainer cc = new CookieContainer ();
 			Cookie cookie = new Cookie ("Height", "178", "/Whatever", "mono.com");
 			cc.Add (cookie);
@@ -1386,6 +1387,7 @@ namespace MonoTests.System.Net {
 		{
 			CookieContainer cc;
 			CookieCollection cookies;
+			string hostname = Dns.GetHostName ();
 
 			cc = new CookieContainer ();
 			cc.SetCookies (new Uri ("http://localhost/Whatever/Do"),
@@ -1396,9 +1398,9 @@ namespace MonoTests.System.Net {
 			cookies = cc.GetCookies (new Uri ("http://127.0.0.1/Whatever/Do"));
 			Assert.IsNotNull (cookies, "#A3");
 			Assert.AreEqual (0, cookies.Count, "#A4");
-			cookies = cc.GetCookies (new Uri ("http://" + Dns.GetHostName () + "/Whatever/Do"));
+			cookies = cc.GetCookies (new Uri ("http://" + hostname + "/Whatever/Do"));
 			Assert.IsNotNull (cookies, "#A5");
-			Assert.AreEqual (0, cookies.Count, "#A6");
+			Assert.AreEqual (hostname.EndsWith (".local") ? 1 : 0, cookies.Count, "#A6");
 
 			cc = new CookieContainer ();
 			cc.SetCookies (new Uri ("http://127.0.0.1/Whatever/Do"),
@@ -1409,12 +1411,12 @@ namespace MonoTests.System.Net {
 			cookies = cc.GetCookies (new Uri ("http://127.0.0.1/Whatever/Do"));
 			Assert.IsNotNull (cookies, "#B3");
 			Assert.AreEqual (0, cookies.Count, "#B4");
-			cookies = cc.GetCookies (new Uri ("http://" + Dns.GetHostName () + "/Whatever/Do"));
+			cookies = cc.GetCookies (new Uri ("http://" + hostname + "/Whatever/Do"));
 			Assert.IsNotNull (cookies, "#B5");
-			Assert.AreEqual (0, cookies.Count, "#B6");
+			Assert.AreEqual (hostname.EndsWith (".local") ? 1 : 0, cookies.Count, "#B6");
 
 			cc = new CookieContainer ();
-			cc.SetCookies (new Uri ("http://" + Dns.GetHostName () + "/Whatever/Do"),
+			cc.SetCookies (new Uri ("http://" + hostname + "/Whatever/Do"),
 				"Age=26; path=/Whatever; domain=.local");
 			cookies = cc.GetCookies (new Uri ("http://localhost/Whatever/Do"));
 			Assert.IsNotNull (cookies, "#C1");
@@ -1422,9 +1424,9 @@ namespace MonoTests.System.Net {
 			cookies = cc.GetCookies (new Uri ("http://127.0.0.1/Whatever/Do"));
 			Assert.IsNotNull (cookies, "#C3");
 			Assert.AreEqual (0, cookies.Count, "#C4");
-			cookies = cc.GetCookies (new Uri ("http://" + Dns.GetHostName () + "/Whatever/Do"));
+			cookies = cc.GetCookies (new Uri ("http://" + hostname + "/Whatever/Do"));
 			Assert.IsNotNull (cookies, "#C5");
-			Assert.AreEqual (0, cookies.Count, "#C6");
+			Assert.AreEqual (hostname.EndsWith (".local") ? 1 : 0, cookies.Count, "#C6");
 		}
 
 		[Test]