Ammend HDFS-2570 to shorten description.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1208313 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml

@@ -122,17 +122,13 @@ creations/deletions), or "all".</description>
 <property>
   <name>dfs.datanode.https.address</name>
   <value>0.0.0.0:50475</value>
-  <description>The datanode secure http server address and port.
-    If the port is 0 then the server will start on a free port.
-  </description>
+  <description>The datanode secure http server address and port.</description>
 </property>
 
 <property>
   <name>dfs.namenode.https-address</name>
   <value>0.0.0.0:50470</value>
-  <description>The namenode secure http server address and port.
-    If the port is 0 then the server will start on a free port.
-  </description>
+  <description>The namenode secure http server address and port.</description>
 </property>
 
  <property>