altered clac. of search result items per page to display

taking the existing limits into account but make it consistent with search option screen for admin and public user
changes:
  - configured default number of items per page (ConfigPortal_p.html) is used as is (no hardcoded limit)
  - otherwise requests are limited to 100 results per page ( = search option, index.html)
      (this basically is the major change, inc. limit from 20 to 100 for public user)
P.S. - the older grant of more (1000), if no online snippet calculation, is kept (for the time being)

see http://mantis.tokeek.de/view.php?id=627

defaults/yacy.init

@@ -813,7 +813,7 @@ search.audio = false
 search.video = false
 search.app = false
 
-# number of search results displayed by default
+# number of search results per page displayed by default
 search.items = 10
 
 # target for search results; this is the href target attribute inside every search result link

htroot/ConfigPortal.html

@@ -82,7 +82,7 @@ <h2>Integration of a Search Portal</h2>
           </dd>
 
           <dt>Default maximum number of results per page</dt>
-          <dd><input type="text" name="maximumRecords" value="#[maximumRecords]#" size="3" /> <small>max = 100 (with CACHEONLY=5000)</small></dd>
+          <dd><input type="text" name="maximumRecords" value="#[maximumRecords]#" size="3" /></dd>
 
           <dt>Default index.html Page (by forwarder)</dt>
           <dd><input type="text" name="indexForward" value="#[indexForward]#" size="60" /></dd>

htroot/yacysearch.java

@@ -220,14 +220,15 @@ public static serverObjects respond(
 
         // collect search attributes
 
-        int itemsPerPage =
-            Math.min(
-                (authenticated)
-                    ? (snippetFetchStrategy != null && snippetFetchStrategy.isAllowedToFetchOnline()
-                        ? 100
-                        : 5000) : (snippetFetchStrategy != null
-                        && snippetFetchStrategy.isAllowedToFetchOnline() ? 20 : 1000),
-                post.getInt("maximumRecords", post.getInt("count", post.getInt("rows", sb.getConfigInt(SwitchboardConstants.SEARCH_ITEMS, 10))))); // SRU syntax with old property as alternative
+        // check an determine items per page (max of [100 or configured default]}
+        final int defaultItemsPerPage = sb.getConfigInt(SwitchboardConstants.SEARCH_ITEMS, 10);
+        int itemsPerPage = post.getInt("maximumRecords", post.getInt("count", post.getInt("rows", defaultItemsPerPage))); // requested or default // SRU syntax with old property as alternative
+        // whatever admin has set as default, that's always ok
+        if (itemsPerPage > defaultItemsPerPage && itemsPerPage > 100) { // if above hardcoded 100 limit restrict request (except default allows more)
+            // search option (index.html) offers up to 100 (that defines the lower limit available to request)
+            itemsPerPage = Math.max((snippetFetchStrategy != null && snippetFetchStrategy.isAllowedToFetchOnline() ? 100 : 1000), defaultItemsPerPage);
+        }
+
         int startRecord = post.getInt("startRecord", post.getInt("offset", post.getInt("start", 0)));
 
         final boolean indexof = (post != null && post.get("indexof", "").equals("on"));