Merge "Update release notes following the refactor of Block"

diff --combined RELEASE-NOTES-1.34
index e3c1ac3,ea78989..8ad17a4
--- 1/RELEASE-NOTES-1.34
--- 2/RELEASE-NOTES-1.34
+++ b/RELEASE-NOTES-1.34
@@@ -57,7 -57,6 +57,7 @@@ For notes on 1.33.x and older releases
  * …
  
  ==== Removed external libraries ====
 +* The jquery.async module, deprecated in 1.33, was removed.
  * …
  
  === Bug fixes in 1.34 ===
@@@ -158,6 -157,8 +158,8 @@@ because of Phabricator reports
  * JobQueueGroup::pushLazyJobs(), deprecated in 1.33, has been removed.
  * MediaWikiTestCase::stashMwGlobals(), deprecated in 1.32, has been removed.
  * SearchEngine::transformSearchTerm(), deprecated in 1.32, has been removed.
+ * The Block typehint only refers to blocks stored in the database. It should be
+   updated to AbstractBlock in cases where any type of block could be expected.
  * …
  
  === Deprecations in 1.34 ===
@@@ -193,6 -194,9 +195,9 @@@
  * The getSubjectPage, getTalkPage, and getOtherPage of Title are deprecated.
    Use NamespaceInfo's getSubjectPage, getTalkPage, and getAssociatedPage.
  * MWMessagePack class, no longer used, has been deprecated in 1.34.
+ * The Block class is separated into Block (for blocks stored in the database),
+   and SystemBlock (for temporary blocks created by the system). SystemBlock
+   should be used when creating any temporary blocks.
  
  === Other changes in 1.34 ===
  * …