revert handle change

Commit migrated from https://github.com/dotnet/corefx/commit/dbcac6f4401e26b89c0cb7d12692447f4f3afbd9

src/libraries/System.Net.Sockets/src/System/Net/Sockets/DynamicWinsockMethods.cs

@@ -312,7 +312,7 @@ private void EnsureTransmitPackets(SafeCloseSocket socketHandle)
                 IntPtr completionRoutine);
 
     internal delegate SocketError WSARecvMsgDelegateBlocking(
-                SafeCloseSocket socketHandle,
+                IntPtr socketHandle,
                 IntPtr msg,
                 out int bytesTransferred,
                 IntPtr overlapped,

src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.Windows.cs

@@ -103,7 +103,7 @@ internal SocketError WSARecvMsg(SafeCloseSocket socketHandle, IntPtr msg, out in
             return recvMsg(socketHandle, msg, out bytesTransferred, overlapped, completionRoutine);
         }
 
-        internal SocketError WSARecvMsgBlocking(SafeCloseSocket socketHandle, IntPtr msg, out int bytesTransferred, IntPtr overlapped, IntPtr completionRoutine)
+        internal SocketError WSARecvMsgBlocking(IntPtr socketHandle, IntPtr msg, out int bytesTransferred, IntPtr overlapped, IntPtr completionRoutine)
         {
             EnsureDynamicWinsockMethods();
             WSARecvMsgDelegateBlocking recvMsg_Blocking = _dynamicWinsockMethods.GetDelegate<WSARecvMsgDelegateBlocking>(_handle);

src/libraries/System.Net.Sockets/src/System/Net/Sockets/SocketPal.Windows.cs

@@ -379,7 +379,7 @@ public static unsafe SocketError ReceiveMessageFrom(Socket socket, SafeCloseSock
                     wsaMsg.controlBuffer.Length = sizeof(Interop.Winsock.ControlData);
 
                     if (socket.WSARecvMsgBlocking(
-                        handle,
+                        handle.DangerousGetHandle(),
                         (IntPtr)(&wsaMsg),
                         out bytesTransferred,
                         IntPtr.Zero,
@@ -397,7 +397,7 @@ public static unsafe SocketError ReceiveMessageFrom(Socket socket, SafeCloseSock
                     wsaMsg.controlBuffer.Length = sizeof(Interop.Winsock.ControlDataIPv6);
 
                     if (socket.WSARecvMsgBlocking(
-                        handle,
+                        handle.DangerousGetHandle(),
                         (IntPtr)(&wsaMsg),
                         out bytesTransferred,
                         IntPtr.Zero,
@@ -414,7 +414,7 @@ public static unsafe SocketError ReceiveMessageFrom(Socket socket, SafeCloseSock
                     wsaMsg.controlBuffer.Length = 0;
 
                     if (socket.WSARecvMsgBlocking(
-                        handle,
+                        handle.DangerousGetHandle(),
                         (IntPtr)(&wsaMsg),
                         out bytesTransferred,
                         IntPtr.Zero,