Anemone::Page#links: restored upwards dir traversal

[FIXRM #7853]

lib/anemone/page.rb

@@ -107,13 +107,17 @@ module Anemone
           to_absolute( URI( u.path.gsub( /(.*\/)[^\/]+$/, "\\1" ) ) ) rescue next
       end.uniq.compact
 
-      @links |= @links.map do |u|
+      nlinks = []
+      @links.each do |u|
 	      bits = u.path.split('/')
-          while bits.length > 0
+	      while(bits.length > 0)
 		      bits.pop
-          to_absolute( URI( bits.join( '/' ) ) ) rescue next
+		      j = bits.join('/')
+		      j = '/' if j.empty?
+		      nlinks << to_absolute(URI(j)) rescue next
 	      end
-      end.uniq.compact
+      end
+      @links |= nlinks
 
       @links.flatten!
       @links.uniq!