ZOOKEEPER-260. document the recommended values for server id's

git-svn-id: https://svn.apache.org/repos/asf/hadoop/zookeeper/trunk@739405 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -131,6 +131,9 @@ regarding auto watch reset on reconnect. (phunt via mahadev)
    ZOOKEEPER-269. connectionloss- add more documentation to detail. (phunt and
 flavio via mahadev)
 
+   ZOOKEEPER-260. document the recommended values for server id's
+   (mahadev via phunt)
+
 NEW FEATURES:
 
    ZOOKEEPER-276. Bookkeeper contribution (Flavio and Luca Telloli via mahadev)

src/docs/src/documentation/content/xdocs/zookeeperAdmin.xml

@@ -189,7 +189,7 @@ server.3=zoo3:2888:3888</computeroutput></para>
           consists of a single line containing only the text of that machine's
           id. So <filename>myid</filename> of server 1 would contain the text
           "1" and nothing else. The id must be unique within the
-          ensemble.</para>
+          ensemble and should have a value between 1 and 255.</para>
         </listitem>
 
         <listitem>