A web-based sbbsctrl implementation

Or, at least the start of a web-based sbbsctrl implementation, still a lot of configuration screens left to implement. Seems worthwhile to merge now, even though it's mostly just showing log output.

webv4/components/sbbsctrl/documentation-panel.xjs

+<div class="tab-pane fade sbbsctrl-panel <? write(argv[0]); ?>" id="documentationTab">
+    <div class="panel panel-default">
+        <div class="panel-body">
+            <h3>Customizing the panel layout</h3>
+            <p>
+                By default, my preferred layout is used for the panels on this web-based SBBSCTRL interface.  
+                If you'd like to restore the default layout of the panels, you can edit your ctrl/modopts.ini and add these keys/values to the [web] section:
+            </p>
+            <ul>
+                <li>sbbsctrl_quadrant_top_left=nodes,clients,statistics</li>
+                <li>sbbsctrl_quadrant_top_right=mail</li>
+                <li>sbbsctrl_quadrant_bottom_left=term,events</li>
+                <li>sbbsctrl_quadrant_bottom_right=srvc,ftp,web</li>
+            </ul>
+            <p>
+                Of course you can customize the layout by changing the order of the values, or even moving them to a different quadrant.  And if you want
+                to hide a panel, just don't include it as a value in any of the four keys.
+            </p>
+            <p>
+                You may want to also include "configuration" as a value at the end of one of the four keys, just in case this panel is updated with new
+                information in the future.
+            </p>
+        </div>
+    </div>
+</div>