- plugin administration: small fix during activation phase

- plugins: added 3 actions in category_cats.inc.php and 1 event that allow a plugin to decide if insertion to #history occurs
- added a warning in section_init if script_basename() is not index or picture (I think we'll have issues on some servers with this function)
- web service methods categories.getImages, tags.getImages and images.search return now the image comment

git-svn-id: http://piwigo.org/svn/trunk@1880 68402e56-0260-453c-a942-63ccdbb3a9ee

include/section_init.inc.php

@@ -298,6 +298,9 @@ else
       }
       break;
     }
+    default:
+      trigger_error('script_basename "'.script_basename().'" unknown',
+        E_USER_WARNING);
   }
 }