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 |
+-------------------------------------------------------------+---------------------------------------------------+---+

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