try to dlopen any file in datasources dir

src/datasource_cache.cpp

@@ -98,15 +98,6 @@ namespace mapnik
 		if (!is_directory( *itr ))
                 {
                     std::string file_name(str+"/"+itr->leaf());
-
-		    if (file_name=="." || file_name=="..")
-			continue;
-                    std::string::size_type len=file_name.size();
-		    
-                    if (len>3 && 
-			file_name[len-1]=='o' && 
-			file_name[len-2]=='s')
-                    {
 		    lt_dlhandle module=lt_dlopenext(file_name.c_str());
 		    if (module)
 		    {
@@ -123,7 +114,6 @@ namespace mapnik
 		    }
                 }
             }
-            }
 	    
         }	
     }