User:Brion VIBBER/stuff for update

Extension changes:
 * remove "Poem" extension -- merged
 * remove "UniversalEditButton" extension -- merged
 * remove "Makesysop" extension -- merged ages ago (Makebot meanwhile has log issues (see also: 14156))

Apply minor schema updates:
 * extensions/FlaggedRevs/archives/patch-rfb_timestamp.sql
 * done!
 * extensions/Oversight/patch-hidden-indexes.sql
 * done!
 * ipb_allow_usertalk update?
 * ALTER TABLE /*$wgDBprefix*/ipblocks CHANGE ipb_allow_usertalk ipb_allow_usertalk bool NOT NULL default 1;
 * done!

Run the svnImport update...
 * Done!