Change library class PlatDriOverLib to PlatformDriOverrideLib

Move Application Platform Override Manager into Application directory.
Add comments in Network library class to say they are only intended to be used by UEFI network stack modules.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7641 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Include/Library/UdpIoLib.h

@@ -1,6 +1,6 @@
 /** @file
-  The helper routines to access UDP service. It is used by both
-  DHCP and MTFTP.
+  Ihis library is only intended to be used by UEFI network stack modules.
+  It provides the helper routines to access UDP service. It is used by both DHCP and MTFTP.
 
 Copyright (c) 2006 - 2008, Intel Corporation.<BR>
 All rights reserved. This program and the accompanying materials
@@ -169,6 +169,26 @@ BOOLEAN
   IN VOID                   *Context
   );
 
+/**
+  Cancel all the sent datagram that pass the selection criteria of ToCancel.
+  If ToCancel is NULL, all the datagrams are cancelled.
+
+  @param[in]  UdpIo                 The UDP_IO_PORT to cancel packet.
+  @param[in]  IoStatus              The IoStatus to return to the packet owners.
+  @param[in]  ToCancel              The select funtion to test whether to cancel this
+                                    packet or not.
+  @param[in]  Context               The opaque parameter to the ToCancel.
+
+**/
+VOID
+EFIAPI
+UdpIoCancelDgrams (
+  IN UDP_IO_PORT            *UdpIo,
+  IN EFI_STATUS             IoStatus,
+  IN UDP_IO_TO_CANCEL       ToCancel,        OPTIONAL
+  IN VOID                   *Context
+  );
+
 /**
   Create a UDP_IO_PORT to access the UDP service. It will create and configure
   a UDP child.