Imported Upstream version 5.12.0.220

Former-commit-id: c477e03582759447177c6d4bf412cd2355aad476

mcs/class/System/Test/System.Net.Sockets/SocketAsyncTest.cs

@@ -98,6 +98,7 @@ namespace MonoTests.System.Net.Sockets
 
 		[Test]
 		[Category("Test")]
+		[Category("MultiThreaded")]
 #if FEATURE_NO_BSD_SOCKETS
 		[ExpectedException (typeof (PlatformNotSupportedException))]
 #endif

mcs/class/System/Test/System.Net.Sockets/SocketTest.cs.REMOVED.git-id

@@ -1 +1 @@
-d1bb2ffee7ac63a76151854a3bc57ec5d6a2a70a
+1e25aea1bb2838df06140728a614e421211c3ab8

mcs/class/System/Test/System.Net.Sockets/TcpListenerTest.cs

@@ -49,7 +49,10 @@ namespace MonoTests.System.Net.Sockets
 				}
 			}
 			
-			// make sure the connection arrives
+			// There is no guarantee that the connecting socket will be in the listener's
+			//  accept queue yet (though it is highly likely on Linux). We wait up to one
+			//  second for the connecting socket to enter the listener's accept queue.
+			Assert.IsTrue (inListener.Server.Poll (1000, SelectMode.SelectRead));
 			Assert.IsTrue (inListener.Pending ());
 			Socket inSock = inListener.AcceptSocket ();