Used relative URLs in ConfigPortal preview frames.

This is more reliable when YaCy is behind a reverse proxy.

Also updated integration examples to keep the current protocol part
(http or https) in the example address.

htroot/ConfigPortal.html

@@ -139,7 +139,7 @@
     </h3>
     <fieldset><pre>
       &lt;iframe name=&quot;target&quot;
-       src=&quot;http://#[myaddress]#/index.html?display=2&amp;resource=local&quot;
+       src=&quot;#[myContext]#/index.html?display=2&amp;resource=local&quot;
        width=&quot;100%&quot;
        height=&quot;410&quot;
        frameborder=&quot;0&quot;
@@ -149,7 +149,7 @@
     </pre></fieldset>
     This would look like:
     <iframe name="target"
-       src="#[myPreviewContext]#/index.html?display=2&amp;resource=local&amp;focus=0"
+       src="index.html?display=2&amp;resource=local&amp;focus=0"
        width="100%"
        height="410"
        frameborder="0"
@@ -162,7 +162,7 @@
     </h3>
     <fieldset><pre>
       &lt;iframe name=&quot;target2&quot;
-       src=&quot;http://#[myaddress]#/yacysearch.html?display=2&amp;resource=local&quot;
+       src=&quot;#[myContext]#/yacysearch.html?display=2&amp;resource=local&quot;
        width=&quot;100%&quot;
        height=&quot;180&quot;
        frameborder=&quot;0&quot;
@@ -172,7 +172,7 @@
     </pre></fieldset>
     This would look like:
     <iframe name="target2"
-       src="#[myPreviewContext]#/yacysearch.html?display=2&amp;resource=local&amp;focus=0"
+       src="yacysearch.html?display=2&amp;resource=local&amp;focus=0"
        width="100%"
        height="180"
        frameborder="0"
@@ -186,7 +186,7 @@
     </h3>
     <fieldset><pre>
       &lt;iframe name="target3"
-       src=&quot;http://#[myaddress]#/yacyinteractive.html?display=2&quot;
+       src=&quot;#[myContext]#/yacyinteractive.html?display=2&quot;
        width=&quot;100%&quot;
        height=&quot;180&quot;
        frameborder=&quot;0&quot;
@@ -196,7 +196,7 @@
     </pre></fieldset>
     This would look like:
     <iframe name="target3"
-       src="#[myPreviewContext]#/yacyinteractive.html?display=2&amp;focus=0"
+       src="yacyinteractive.html?display=2&amp;focus=0"
        width="100%"
        height="180"
        frameborder="0"

htroot/ConfigPortal.java

@@ -228,14 +228,7 @@ public class ConfigPortal {
         prop.put("target_selected_special_searchresult", "searchresult".equals(target_special) ? 1 : 0);
         prop.put("target_special_pattern", sb.getConfig(SwitchboardConstants.SEARCH_TARGET_SPECIAL_PATTERN, ""));
 
-        /* Address used in code template */
-        String myaddress = (sb.peers == null) || sb.peers.mySeed() == null || sb.peers.mySeed().getIPs().isEmpty() ? null : sb.peers.mySeed().getPublicAddress(sb.peers.mySeed().getIPs().iterator().next());
-        if (myaddress == null) {
-            myaddress = "localhost:" + sb.getLocalPort();
-        }
-        prop.put("myaddress", myaddress);
-        
-        prop.put("myPreviewContext", YaCyDefaultServlet.getContext(header, sb));
+        prop.put("myContext", YaCyDefaultServlet.getContext(header, sb));
         return prop;
     }