Merge "Introduce MovePage::moveSubpages(IfAllowed)"

diff --cc RELEASE-NOTES-1.34
index 8183145,a62c548..197d983
--- 1/RELEASE-NOTES-1.34
--- 2/RELEASE-NOTES-1.34
+++ b/RELEASE-NOTES-1.34
@@@ -216,8 -214,9 +216,10 @@@ because of Phabricator reports
    and SystemBlock (for temporary blocks created by the system). SystemBlock
    should be used when creating any temporary blocks.
  * Parser::$mConf is deprecated. It will be removed entirely in a later version.
 +  Some context can be found at T224165.
  * Constructing Parser directly is deprecated. Obtain one from ParserFactory.
+ * Title::moveSubpages is deprecated. Use MovePage::moveSubpages or
+   MovePage::moveSubpagesIfAllowed.
  
  === Other changes in 1.34 ===
  * …