Adding more docs to help wiki, a=chris

diff --git a/src/configs/PublicHelpPages.php b/src/configs/PublicHelpPages.php
index 8e263f35d..efb991a0d 100644
--- a/src/configs/PublicHelpPages.php
+++ b/src/configs/PublicHelpPages.php
@@ -2048,30 +2048,32 @@ robots=

 description=

+alternative_path=
+
 page_header=

 page_footer=

-END_HEAD_VARS'''Add Machine''' allows you to add a new machine to be controlled by this Yioop instance.
-
-<br />
-
-The '''Machine Name''' field lets you give this machine an easy to remember name. The Machine URL field should be filled in with the URL to the installed Yioop instance.
-
-<br />
-
-The '''Mirror''' check-box says whether you want the given Yioop installation to act as a mirror for another Yioop installation. Checking it will reveal a drop-down menu that allows you to choose which installation amongst the previously entered machines you want to mirror.
-
-<br />
-
-The '''Has Queue Server''' check-box is used to say whether the given Yioop installation will be running a queue server or not.
-
-<br />
-
-Finally, the '''Number of Fetchers''' drop down allows you to say how many fetcher instances you want to be able to manage for that machine.
-
-<br />
+sort=aname

+END_HEAD_VARS'''Add Machine''' allows you to add a new machine to be controlled by this Yioop instance.
+
+<br />
+
+The '''Machine Name''' field lets you give this machine an easy to remember name.
+<br />
+
+The '''Machine URL''' field should be filled in with the URL to the installed Yioop instance.
+<br />
+
+The '''Type/Channel''' controls, if set to a natural number, the channel that the queue servers and fetchers of this machine will use. The given machine will then only participate in crawls assigned to this channel number. If '''Type/Channel''' is set to '''Replica Server''', then a Parent Dropdown will appear where one can select the machine that the given machine will mirror. Mirroring is only supported for now for query results.
+If a Mirror server is created and turned on, then query results needed from the parent server will alternately come from the Mirror server or its parent.
+<br />
+
+Finally, if '''Type/Channel''' is set to a natural number, the '''Number of Fetchers''' drop down allows you to say how many fetcher instances you want to be able to manage for that machine.
+
+<br />
+
 {{right|[[https://www.seekquarry.com/?c=static&p=Documentation#GUI%20for%20Managing%20Machines%20and%20Servers|Learn More..]]}}
 EOD;
 $help_pages["en-US"]["Max_Depth"] = <<< EOD
@@ -2300,15 +2302,19 @@ robots=

 description=

+alternative_path=
+
 page_header=

 page_footer=

-END_HEAD_VARSYioop can be run in a single machine or multi-machine setting. In a multi-machine setting, copies of Yioop software would be on different machines. One machine called the &#039;&#039;&#039;Name Server&#039;&#039;&#039; would be responsible for coordinating who crawls what between these machines. This fieldset allows the user to specify the url of the Name Server as well as a string (which should be the same amongst all machines using that name server) that will be used to verify that this machine is allowed to talk to the Name Server. In a single machine setting these settings can be left at their default values.
-
-&lt;br /&gt;
+sort=aname

-When someone enters a query into a Yioop set-up, they typically enter the query on the name server. The &#039;&#039;&#039;Use Filecache&#039;&#039;&#039; checkbox controls whether the query results are cached in a file so that they don&#039;t have to be recalculated when someone enters the same query again. The file cache is purged periodically so that it doesn&#039;t get too large.
+END_HEAD_VARSYioop can be run in a single machine or multi-machine setting. In a multi-machine setting, copies of Yioop software would be on different machines. One machine called the &#039;&#039;&#039;Name Server&#039;&#039;&#039; would be responsible for coordinating who crawls what between these machines. This fieldset allows the user to specify the url of the Name Server as well as a string (which should be the same amongst all machines using that name server) that will be used to verify that this machine is allowed to talk to the Name Server. In a single machine setting these settings can be left at their default values.
+
+&lt;br /&gt;
+
+When someone enters a query into a Yioop set-up, they typically enter the query on the name server. The &#039;&#039;&#039;Use Filecache&#039;&#039;&#039; checkbox controls whether the query results are cached in a file so that they don&#039;t have to be recalculated when someone enters the same query again. The file cache is purged periodically so that it doesn&#039;t get too large. Sometimes it is useful, however, to know the file cache has just been cleared. The &#039;&#039;&#039;Clear Cache&#039;&#039;&#039; link clears both the file cache as well as the local DNS-IP of machines part of this Yioop instance.
 EOD;
 $help_pages["en-US"]["Page_Byte_Ranges"] = <<< EOD
 page_type=standard
diff --git a/src/data/public_default.db b/src/data/public_default.db
index 661e6d617..df6e086b2 100644
Binary files a/src/data/public_default.db and b/src/data/public_default.db differ