[Change summary]:

1. Update NetLib to a combined NetLib support dual network stack:
1) Add Network Debug facility for IPv4 stack.
2) Extend the library APIs to support IPv6 stack:
   a. NetIp6IsUnspecifiedAddr
   b. NetIp6IsLinkLocalAddr   
   c. NetIp6IsNetEqual
   d. NetLibCreateIPv6DPathNode.
   e. NetIp6PseudoHeadChecksum
   f. NetIp6IsValidUnicast
3) Update the structure definitions:
   a. Update NET_BUF to add EFI_IP6_HEADER and EFI_UDP_HEADER
   b. Add NET_IP6_PSEUDO_HDR
4) Update Ip4IsUnicast to NetIp4IsUnicast

2. Update the impacted modules to adopt the combined NetLib.

3. Clean up coding style errors in all network drivers and libraries.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9391 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c

@@ -1962,7 +1962,7 @@ EfiIp4Transmit (
   // a IP4_TXTOKEN_WRAP and the data in a netbuf
   //
   Status = EFI_OUT_OF_RESOURCES;
-  Wrap   = AllocatePool (sizeof (IP4_TXTOKEN_WRAP));
+  Wrap   = AllocateZeroPool (sizeof (IP4_TXTOKEN_WRAP));
   if (Wrap == NULL) {
     goto ON_EXIT;
   }