Meta namespace cleanup

The meta namespace here on meta is now "Meta:" instead of "Wikipedia:" <brain explodes>

Some links may be incorrect.

As per the software defaults, since "Wikipedia:" is no longer a special namespace here it makes an interwiki link to Wikipedia, eg Wikipedia:Hyperlink. This may or may not be desireable.

Not many 'Wikipedia:' pages were used here; a lot of those that were here were either redirects for default links in the interface or internal log & cache pages. Note that some interface strings may now be soft-hard-coded with 'Wikipedia:' where they would have been updated to 'Meta:' except for the new editable-page stuff. These'll have to be manually fixed.

Here's a quick dump of allegedly formerly working links to pages in Wikipedia: namespace here. Where the links are legit, they should be updated to use Meta:

mysql> select l_from,cur_title,cur_namespace as ns from links,cur where l_to=cur_id and cur_namespace in (4,5);
+-------------------------------------------------------------+----------------------------------------------------+----+
| l_from                                                      | cur_title                                          | ns |
+-------------------------------------------------------------+----------------------------------------------------+----+
| What_Wikipedia_claims_to_be                                 | About                                              |  4 |
| User:Maveric149/miscellaneous                               | Administrators                                     |  4 |
| User:Walter                                                 | Administrators                                     |  4 |
| Power_structure                                             | Administrators                                     |  4 |
| Meta-Wikimedia:Requests_for_undeletion                      | Administrators                                     |  4 |
| RK/notes_2                                                  | Administrators                                     |  4 |
| Hauptseite                                                  | Artikel_des_Tages                                  |  4 |
| Artikel_des_Tages                                           | Artikel_des_Tages                                  |  4 |
| Talk:Case_insensitivity                                     | Bug_reports                                        |  4 |
| User_talk:Aarrrggghhh                                       | Copyrights                                         |  4 |
| MediaWiki                                                   | Copyrights                                         |  4 |
| Fair_use                                                    | Copyrights                                         |  4 |
| Talk:Wikimedia_Constitution                                 | Copyrights                                         |  4 |
| Meta-Wikimedia:Requests_for_deletion                        | Deletion_log                                       |  4 |
| Power_structure                                             | Deletion_log                                       |  4 |
| Transwiki                                                   | Deletion_log                                       |  4 |
| Hauptseite                                                  | Diskussionsseiten                                  |  4 |
| What_Wikipedia_claims_to_be                                 | Embassy                                            |  4 |
| Current_issues                                              | Embassy                                            |  4 |
| Current_issues/German_Wikipedia                             | Embassy                                            |  4 |
| Current_issues/French_Wikipedia                             | Embassy                                            |  4 |
| Current_issues/Small_Wikipedias                             | Embassy                                            |  4 |
| User_talk:HeKeIsDa                                          | Embassy                                            |  4 |
| Current_issues/Spanish_Wikipedia                            | Embassy                                            |  4 |
| Meta-Wikimedia:Deletion_policy                              | Embassy                                            |  4 |
| Hauptseite                                                  | Handbuch                                           |  4 |
| User:Maveric149/miscellaneous                               | Help                                               |  4 |
| Text_in_MediaWiki                                           | How_does_one_edit_a_page                           |  4 |
| MediaWiki                                                   | Interlanguage_links                                |  4 |
| Why_Wikipedia_runs_slow                                     | Interlanguage_links                                |  4 |
| Hoofdpagina                                                 | Lijst_van_in_het_oog_te_houden_anonieme_gebruikers |  4 |
| What_Wikipedia_is                                           | Mention_of_Wikipedia_in_articles                   |  4 |
| What_wikipedia_thinks_it_is                                 | Mention_of_Wikipedia_in_articles                   |  4 |
| What_Wikipedia_claims_to_be                                 | Mention_of_Wikipedia_in_articles                   |  4 |
| Wikipedia:Mention_of_wiki_in_articles                       | Mention_of_Wikipedia_in_articles                   |  4 |
| User_talk:The_Cunctator                                     | Mention_of_wiki_in_articles                        |  4 |
| What_Wikipedia_is                                           | Mention_of_wiki_in_articles                        |  4 |
| What_wikipedia_thinks_it_is                                 | Mention_of_wiki_in_articles                        |  4 |
| What_Wikipedia_claims_to_be                                 | Mention_of_wiki_in_articles                        |  4 |
| Wikipedia:Mention_of_Wikipedia_in_articles                  | Mention_of_wiki_in_articles                        |  4 |
| User_talk:Brion_VIBBER                                      | Recentchanges                                      |  4 |
| User_talk:Ezel                                              | Recentchanges                                      |  4 |
| Wikipedia:Recentchanges                                     | Recentchanges/All_languages                        |  4 |
| Talk:Wikipedia_vandalism                                    | Replies_to_common_objections                       |  4 |
| Hoofdpagina                                                 | Requests_for_deletion                              |  4 |
| Forside                                                     | Requests_for_deletion                              |  4 |
| Strona_główna                                             | Requests_for_deletion                              |  4 |
| Huvudsida                                                   | Requests_for_deletion                              |  4 |
| Main_Page/temp                                              | Requests_for_deletion                              |  4 |
| Main_Page_Neutral                                           | Requests_for_deletion                              |  4 |
| Meta-Wikimedia:Requests_for_undeletion                      | Requests_for_deletion                              |  4 |
| Azal                                                        | Requests_for_deletion                              |  4 |
| 首页                                                      | Requests_for_deletion                              |  4 |
| Wikipedians_who_are_students_or_alumni_of_McGill_University | Requests_for_deletion                              |  4 |
| Main_Page/temp2                                             | Requests_for_deletion                              |  4 |
| Meta.Wikimedia:About                                        | Requests_for_deletion                              |  4 |
| Hovedside                                                   | Requests_for_deletion                              |  4 |
| Hauptseite                                                  | Requests_for_deletion                              |  4 |
| Meta-Wikimedia:Requests_for_deletion                        | Requests_for_undeletions                           |  4 |
| Talk:Bans_and_blocks                                        | Requests_for_undeletions                           |  4 |
| User_talk:142.177.9.90                                      | Requests_for_undeletions                           |  4 |
| Main_Page/temp2                                             | Requests_for_undeletions                           |  4 |
| Meta.Wikimedia:About                                        | Requests_for_undeletions                           |  4 |
| Hauptseite                                                  | Seiten_im_Wikipedia-Namensraum                     |  4 |
| LanguageHi.php                                              | User_preferences_help                              |  4 |
| LanguageAr.php                                              | User_preferences_help                              |  4 |
| LanguageTt.php                                              | User_preferences_help                              |  4 |
| Languageta.php                                              | User_preferences_help                              |  4 |
| LanguageOc.php                                              | User_preferences_help                              |  4 |
| Sandbox                                                     | Zipper                                             |  4 |
| User:Brion_VIBBER/Todo_list                                 | Administrators                                     |  5 |
| User_talk:Denis                                             | Requests_for_deletion                              |  5 |
+-------------------------------------------------------------+---------------------------------------------------+---+