Master -> Standalone Cluster Master

Author: ash211

docs/configuration.md

@@ -805,7 +805,7 @@ firewall settings.  Below are the primary ports that Spark uses for its communic
   <!-- Web UIs -->
   <tr>
     <td>Browser</td>
-    <td>Master</td>
+    <td>Standalone Cluster Master</td>
     <td>8080</td>
     <td>Web UI</td>
     <td><code>spark.history.ui.port</code></td>
@@ -831,15 +831,15 @@ firewall settings.  Below are the primary ports that Spark uses for its communic
   <!-- Cluster interactions -->
   <tr>
     <td>Application</td>
-    <td>Master</td>
+    <td>Standalone Cluster Master</td>
     <td>7077</td>
     <td>Submit job to cluster</td>
     <td><code>spark.driver.port</code></td>
     <td>Uses Akka.  Set to "0" to choose a port randomly</td>
   </tr>
   <tr>
     <td>Worker</td>
-    <td>Master</td>
+    <td>Standalone Cluster Master</td>
     <td>7077</td>
     <td>Join cluster</td>
     <td><code>spark.driver.port</code></td>