- remember me cookie security improvement (the time when the cookie was generated is saved and checked in range [now-remember_me_length; now]

- tags improvements
 * pass to templates all fields in table #tags (handy for plugins such as type tags)
 * fix issue with tag letter when first letter is accentuated (utf-8)
 * tags are sorted on url_name instead of name (accentuated first letter chars are the same as without accent)
 * better use of columns in by letter display mode

git-svn-id: http://piwigo.org/svn/trunk@2409 68402e56-0260-453c-a942-63ccdbb3a9ee

include/functions_html.inc.php

@@ -550,6 +550,11 @@ function name_compare($a, $b)
   return strcmp(strtolower($a['name']), strtolower($b['name']));
 }
 
+function tag_alpha_compare($a, $b)
+{
+  return strcmp(strtolower($a['url_name']), strtolower($b['url_name']));
+}
+
 /**
  * exits the current script (either exit or redirect)
  */
@@ -732,7 +737,7 @@ function render_category_literal_description($desc)
   return strip_tags($desc, '<span><p><a><br><b><i><small><big><strong><em>');
 }
 
-/** returns the argument_ids array with new sequenced keys based on related 
+/** returns the argument_ids array with new sequenced keys based on related
  * names. Sequence is not case sensitive.
  * Warning: By definition, this function breaks original keys
  */