MediaWiki 1.31 is an alpha-quality branch and is not recommended for use in
production.
+=== Changes since MediaWiki 1.31.0-rc.2 ===
+* (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
+* (T196092) Hide MySQL binary/utf-8 charset option in the installer.
+* (T196185) Don't allow setting $wgDBmysql5 in the installer.
+
+=== Changes since MediaWiki 1.31.0-rc.0 ===
+* (T33223) Drop archive.ar_text and ar_flags.
+* Add default edit rate limit of 90 edits/minute for all users.
+* (T187645) Use codepoint as tiebreaker when getting first-letters in
+ IcuCollation.
+* (T191947) Don't shell during the installer if shelling out is disabled.
+* (T194319) Improve duplicate config setting exception as part of extension
+ registration.
+* (T195211) Don't require trailing slash in PSR-4 autoloader directory.
+* (T186565) Fix PHP Notice from `ob_end_flush()` in `FileRepo::streamFile()`.
+* Do not incorrectly hide namespace input field in the installer.
+* (T186456) Refactor checks looking for PEAR maik libraries to be clearer.
+
=== Important pre-upgrade notes for 1.31 ===
* If you're using MySQL, SQLite, or MSSQL, are not using update.php to apply
schema changes, and cannot have downtime to run migrateArchiveText.php and
framework that it enables. Some extensions mistakenly used this to check
whether any AJAX functionality at all should be enabled, further making this
problematic to retain.
-* Add default edit rate limit of 90 edits/minute for all users.
* $wgDBmysql5 is now deprecated, and will be removed in a future version. It
has been marked as experimental ever since it was introduced.
* (T2087, T10897, T87753, T174639) Whitespace created by category and language
links is now stripped rather than leaving blank lines in odd places.
* (T3780) Uploads with UTF-8 names now work on PHP7.1+ on Windows servers.
-* (T186565) Fix PHP Notice from `ob_end_flush()` in `FileRepo::streamFile()`.
=== Action API changes in 1.31 ===
* (T185058) The 'name' value to tgprop for action=query&list=tags has been