Doc: Update the build variables section (#670)

* Update the deprecated variables section in readme

Signed-off-by: Leo Christy Jesuraj <[email protected]>

* Update the build variables section in readme

Signed-off-by: Leo Christy Jesuraj <[email protected]>

---------

Signed-off-by: Leo Christy Jesuraj <[email protected]>

Author: leochr

README.md

@@ -3,7 +3,7 @@
 - [WebSphere Application Server Liberty and Containers](#websphere-application-server-liberty-and-containers)
   - [Container images](#container-images)
   - [Building an application image](#building-an-application-image)
-  - [Optional Enterprise Functionality](#optional-enterprise-functionality)
+  - [Build Variables](#build-variables)
   - [Security](#security)
   - [OpenJ9 Shared Class Cache (SCC)](#openj9-shared-class-cache-scc)
   - [Logging](#logging)
@@ -67,9 +67,9 @@ remoteRepo.password={aes}KM8dhwcv892Ss1sawu9R+
 
 Refer to [Repository and proxy modifications](https://openliberty.io/docs/ref/command/featureUtility-commands.html) for more information.
 
-## Optional Enterprise Functionality
+## Build Variables
 
-This section describes the optional enterprise functionality that can be enabled via the Dockerfile during `build` time, by setting particular argument (`ARG`) or environment variable (`ENV`) and calling `RUN configure.sh`.  Each of these options trigger the inclusion of specific configuration via XML snippets (except for `VERBOSE` and `SKIP_FEATURE_INSTALL`), described below:
+This section describes the optional build variables that can be enabled via the Dockerfile during the `build` time, by setting particular build-argument (`ARG`) or environment variable (`ENV`) and calling `RUN configure.sh`.  Each of these variables trigger the inclusion of specific configuration via XML snippets (except for `VERBOSE` and `SKIP_FEATURE_INSTALL`), described below:
 
 * `HZ_SESSION_CACHE`
   *  Description: Enable the persistence of HTTP sessions using JCache by adding the `sessionCache-1.0` feature.
@@ -83,9 +83,9 @@ This section describes the optional enterprise functionality that can be enabled
   *  Description: When set to `true` it outputs the commands and results to stdout from `configure.sh`. Otherwise, default setting is `false` and `configure.sh` is silenced.
 
 
-### Deprecated Enterprise Functionality
+### Deprecated Build Variables
 
-The following enterprise functionalities are now **deprecated** and will be **removed** in a future release. You should **stop** using them :
+The following container image build variables are now **deprecated** and will be **removed** in a future release. You should **stop** using them:
 
 * `HTTP_ENDPOINT`
   *  Description: Add configuration properties for an HTTP endpoint.