Limit listings to 150 items.

Works around bots generating excessive traffic by stepping through all
listing pages.

syslabcom/scrum#2211

Author: reinhardt

src/recensio/plone/browser/listing.py

@@ -45,7 +45,7 @@ def rss_url(self):
     @property
     def items(self):
         catalog = api.portal.get_tool("portal_catalog")
-        results = catalog(self.query)
+        results = catalog(self.query)[:150]
         IAnnotations(self.request)["recensio.query_results"] = results
         results = IContentListing(results)
         return results