Merge branch 'wscan' into release-3.15.1.0

files/www/help.html

@@ -71,12 +71,14 @@ provided through those nodes.
  provides which gives you detailed information about the current state of the
  OLSR routing software.<br><br></li>
 
-<li><strong>WiFi Scan</strong> provides a list of the WiFi networks that the
+<li><strong>WiFi Scan</strong> displays a list of other 802.11 signals that the
-node can see. It cannot show you which other nodes are visible, that is what the
+node can see and only of the same bandwidth.   The 802.11 signals include
-Mesh Status and OLSR Status pages are for.  There is an automatic scan mode but it
+Access Points (AP), neighbor nodes (connected ad-hoc stations), and other mesh networks 
-is recommended that it not be used continuously because the mesh performance
+(foriegn ad-hoc networks). The AREDN mesh is created on top of an 802.11 'ad-hoc' network.  
-will suffer due to the node spending much of its time on other channels
+Consequently when multiple ad-hoc networks are visiable to each other (different SSID or 
-looking for other networks.<br><br></li>
+channel), the 'network' is displayed and not individual nodes (stations).  There is also an 
+automatic scan mode. It is not recommend to run a wifi scan continously because this will degrade mesh 
+performance. A wifi scan transmits queries on all channels to discover other devices.<br><br></li>
 
 <li><strong>Setup</strong> takes you to the setup pages of the web
 interface. You will need to supply a username and password to access those