Suggestions to split from core into extensions

Maybe

 * Monobook edit toolbar — See discussion: 26914

Special pages

 * Uncategorized categories, files, pages, and templates
 * Unused categories, files, and templates, and orphaned pages
 * Wanted categories, files, pages, and templates
 * Most linked to categories, categories, files, pages, and templates
 * Why? Max Semenik 05:18, 27 April 2011 (UTC)

Has already been split

 * Extension:AskSQL
 * Extension:Math (done in trunk r86741, 14202)
 * It's a bit silly to have in core distribution, most people don't need it and it has lots of external dependencies.