Log Message:
- updated package to 6.20
- update patch provided by V.Seifert

ChangeLog:

- #494462 by z.stolar: modify robots.txt to give search engine crawlers
  permission to index content in /sites/*, such as images uploaded to the
  site #481142 by JohnAlbin, sociotech: theme settings forms were not
  inherited by sub-themes
- #764548 by Dave Reid, sun: backport hiding of hidden modules on the
  modules page, so if projects include hidden modules for testing, those
  will not confuse users #687674 by jefnguo, rdrh555: fix minor code
  documentation typo in menu.inc
- #881540 by bjaspan: make syslog identity configurable on the user
  interface (instead of hardwired to 'drupal') #280930 by pillarsdotnet,
  oadaeh, David_Rothstein: fall back on an empty array if hook_schema is
  not defined for a module
- #956320: clean up documentation for menu_set_active_trail #903016 by
  daniels220: path argument was not documented on the arg() function
- #618280 by daniels220: minor fix to drupal_add_css() documentation to
  have correct path example #926440 by daniels220: document search_form()
  return value properly
- #716348 by grendzy, hefox: document that drupal_get_path(),
  drupal_load() and drupal_get_filename() can be used with 'profile' as
  well #767408 by hunmonk: copy semaphore site creation to
  update_fix_d6_requirements() to solve issues upgrading from any version
  of Drupal 5
- #948520 by jhodgdon, mvc: fix formatting in Schema API documentation
  lists #931304 by subnet_rx, webkenny: backport support for newly popular
  tel: protocol in filter_xss_bad_protocols()
- #937508 by amateescu: document the return value of arg() better #505730
  by alexanderpas, jhodgdon: document return value of
  valid_email_address() better
- #930784 by Jay Matwichuk, daniels220: fix argument name in code
  documentation for db_add_field() #225950 by mgriego, daniels220,
  jhodgdon: improve documentation on theme_image()
- #698248 by andypost: fix notice in cache.inc when $user->cache is not
  defined #872374 by sender: user_load() can take a uid not just an array;
  document that properly
- #942718 by joachim: document where drupal_get_form() arguments end up in
  form arrays #895858 by dstol: fix documentation of possible $item values
  in menu_link_save()
- #379348 by dstol: refine documentation on node_submit() #403034 by
  Andreas Wolf, roderik: node_assign_owner_action() should use
  node_get_types('name', ...) to get the name of the node type
- #829968 by AlexisWilke, andypost: fix drupal_lookup_path() to always
  return FALSE if the source was not found, not just for the 2nd call
  onwards #245990 by David_Rothstein, Pedro Lozano, andypost: do not
  follow any redirections in system_check_http_request() since we only
  need data on whether HTTP requests worked at all
- #366768 by druppi, hass, plach, GiorgosK: do not link to unpublished
  translation nodes, even if user would have access to them (once
  published) #764234 by yan_nick, Zoltan Balogh and myself: backport width
  of user filter labels in admin forms; better fit for some translations
- #971400 by myself, pp: backport change of language source URLs from
  Drupal 7 #809616 by catch, hswong3i: fix notice in menu rebuild
- #973242 by pp: log type name not properly translated in dblog.module
- #147000 by pwolanin, mikeytown2, et. al.: avoid multiple, parallel
  rebuildings of module and theme data
- #969252 by Dave Reid: save hook_help implementation in upload.module for
  admin/settings/uploads #993834 by adamgerbert, nenne: fix documentation
  of return value in do_search
- #991944 by Jacine: theme_locale_admin_manage_screen() doesn't exist
- #841134 by daniels220, jhodgdon: file_save_upload() documentation
  corrections
- #287647 by bjaspan, lilou, mikejoconnor, cafuego, Déja: cast invalid
  hook_schema() results into arrays at all times #917670 by mr.baileys,
  rdrh555: fix documentation for drupal_alter()
- #357785 by arnoldc, gravalsyr, miro_dietiker, plach: retain the tnid
  value for new nodes saved, so the node object reflects the database
- #422218 by salvis, jeremiah.snapp: fix a case in forum module where non
  forum tids might get picked as the forum topic tid
- #488166 by EmanueleQuinto, Damien Tournoud, jhodgdon: search relevance
  calculation fails if last_comment_timestamp is NULL #881132 by HLopes,
  Garrett Albright: CSS files with non-UTF-8 characters broke CSS
  optimization
- #772678 by sun, jpmckinney, Berdir, markus_petrux: no way to specify
  default collation, entirely depended on database configuration (which
  might be inappropriate) #212130 by salvis, boydjd, Steven, grendzy,
  Damien Tournoud: more complete support for unicode entities, to account
  for previously missing entities in decode_entities()
- #307636 by zbricoleur, sreynen, quicksketch: fix file identification bug
  with image file processing on Microsoft IIS Roll back #147000, prevented
  Drupal from being installed.
- #986682 by pkiraly: improve code documentation for db_table_exists() and
  db_column_exists()