NetworkPkg/TlsAuthConfigDxe: Provide the UI to support TLS auth configuration

This patch provides the UI to support TLS auth configuration.
* EFI_SIGNATURE_LIST format is used for 'TlsCaCertificate'
variable. So, TLS supports multiple certificate configuration.
* The variable attribute is BS with NV, which only target at
preventing runtime phase attack.

Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Zhang Lubo <lubo.zhang@intel.com>
Cc: Long Qin <qin.long@intel.com>
Cc: Thomas Palmer <thomas.palmer@hpe.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>

NetworkPkg/Include/Guid/TlsAuthentication.h

@@ -0,0 +1,29 @@
+/** @file
+  This file defines TlsCaCertificate variable.
+  
+Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under 
+the terms and conditions of the BSD License that accompanies this distribution.  
+The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php.                                            
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __TLS_AUTHENTICATION_H__
+#define __TLS_AUTHENTICATION_H__
+
+// Private variable for CA Certificate configuration
+//
+#define EFI_TLS_CA_CERTIFICATE_GUID \
+  { \
+    0xfd2340D0, 0x3dab, 0x4349, { 0xa6, 0xc7, 0x3b, 0x4f, 0x12, 0xb4, 0x8e, 0xae } \
+  }
+
+#define EFI_TLS_CA_CERTIFICATE_VARIABLE       L"TlsCaCertificate"
+
+extern EFI_GUID gEfiTlsCaCertificateGuid;
+
+#endif