[Patch] Readme.MD: Add the feature support scope

[Jiaxin Wu <jiaxin.wu@intel.com>]

This patch is used to add the feature support scope to indicate
the feature completeness criteria, and some contents are also 
updated/refined, e.g. Timeline and Feature Verification section.

Cc: Palmer Thomas <thomas.palmer@hpe.com>
Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Long Qin <qin.long@intel.com>
Cc: Li Ruth <ruth.li@intel.com>
Cc: Zimmer Vincent <vincent.zimmer@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
---
 Readme.MD | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/Readme.MD b/Readme.MD
index a69a2f1..d16eb4c 100644
--- a/Readme.MD
+++ b/Readme.MD
@@ -33,11 +33,11 @@ NetworkPkg/TlsAuthConfigDxe/TlsAuthConfigDxe.inf
 ```
 
 #### HTTPS Authentication
 TLS supports three authentication modes ([RFC5246](https://tools.ietf.org/html/rfc5246)):
 ```
-1. Total anonymity: the server and client won’t authenticate each other.
+1. Total anonymity: the server and client will not authenticate each other.
 2. One-way authentication: server authentication with an unauthenticated client.
 3. Two-way authentication: authentication of both parties.
 ```
 Currently, HTTPS boot feature only support server authentication with an unauthenticated client mode. Others are not in our current feature support scope. To support one-way authentication mode, server CA certificate is required by Client. Private variable is used to configure this CA certificate. **EFI_SIGNATURE_LIST** format is used for this variable. In sum, the Server CA certificate must be configured first to enable HTTPS boot feature. The variable name and GUID are defined as below.
 ```
@@ -54,20 +54,29 @@ Currently, HTTPS boot feature only support server authentication with an unauthe
 | Time | Event | Related Module |
 |:----:|:-----:|:--------------:|
 | 2015.12 | Initial implementation for HTTPS boot feature by leveraging OpenSSL. | HttpDxe, OpensslTlsLib, TlsLib, TlsDxe |
 | 2016.3 | Provided an UI configured driver to support TLS server authentication. | TlsAuthConfigDxe |
 | 2016.4-7 | Hotfix and code refine according community feedback. | Tls1.h, TlsLib, HttpDxe |
+| 2016.8 | Prevent the CA certificates from the runtime phase attack. | TlsAuthConfigDxe |
 | 2016.9 | Support TLS Version negotiation. | TlsLib, HttpDxe |
 |...|...|...|
 
+## Feature Support Scope
+*	Feature usage: Load the specified file from the remote HTTPS server successfully and steadily.
+* UEFI Arch: IA32 and X64 platform.
+*	TLS version: TLS1.0/1.1/1.2, version negotiation.
+*	HTTPS authentication mode: One-way authentication.
+*	CA certificates management: Private variable, prevent runtime phase attack.
+
 ## Feature Verification
-Tomcat and IIS8 are selected as the HTTPS server to verifiy the result, Detiled see below table.
+Tomcat, IIS 8 and Apache2 are selected as the HTTPS server to verify the result of loading the UEFI shell boot file (Shell.efi), detailed see below table.
 
 | HTTPS Server | TLS 1.0 | TLS 1.1 | TLS1.2 |
 |:------------:|:-------:|:-------:|:------:|
 |Tomcat | Pass |Pass | Pass |
-|IIS8 | Pass | Pass | Failure |
+|IIS 8 | Pass | Pass | Failure |
+|Apache2 | Pass | Pass | Pass |
 
 ### NOTES
 TLS version 1.2 in windows server 2012 R2 IIS8 (As HTTPS server) CAN NOT collaborate with UEFI HTTPS client while version 1.1/1.0 works well. To make the UEFI HTTPS client in staging works properly, we have to disable TLS version 1.2 in windows server 2012 R2 by the below PowerShell script:
 ```
 New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server' -Force | Out-Null
-- 
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