+* EditPage underwent some refactoring and deprecations:
+ * EditPage::isOouiEnabled() is deprecated and will always return true.
+ * EditPage::getSummaryInput() and ::getSummaryInputOOUI() are deprecated. Please
+ use ::getSummaryInputWidget() instead.
+ * EditPage::getCheckboxes() and ::getCheckboxesOOUI() are deprecated. Please
+ use ::getCheckboxesWidget() instead.
+ * Creating an EditPage instance without calling EditPage::setContextTitle() should
+ be avoided and will be deprecated in a future release.
+ * EditPage::safeUnicodeInput() and ::safeUnicodeOutput() are deprecated and no-ops.
+ * EditPage::$isCssJsSubpage, ::$isCssSubpage, and ::$isJsSubpage are deprecated. The
+ corresponding methods from Title should be used instead.
+ * EditPage::$isWrongCaseCssJsPage is deprecated. There is no replacement.
+ * EditPage::$mArticle and ::$mTitle are deprecated for public usage. The getters
+ ::getArticle() and ::getTitle() should be used instead.
+ * Trying to control or fake EditPage context by overriding $wgUser, $wgRequest, $wgOut,
+ and $wgLang is no longer supported and won't work. The IContextSource returned from
+ EditPage::getContext() must be modified instead.
+* Parser::getRandomString() (deprecated in 1.26) was removed.
+* Parser::uniqPrefix() (deprecated in 1.26) was removed.
+* Parser::extractTagsAndParams() now only accepts three arguments. The fourth,
+ $uniq_prefix was deprecated in 1.26 and has now been removed.
+* (T172514) The following tables have had their UNIQUE indexes turned into proper
+ PRIMARY KEYs for increased maintainability: categorylinks, imagelinks, iwlinks,
+ langlinks, log_search, module_deps, objectcache, pagelinks, query_cache, site_stats,
+ templatelinks, text, transcache, user_former_groups, user_properties.
+* IDatabase::nextSequenceValue() is no longer needed by any database backends
+ (formerly it was needed by PostgreSQL and Oracle), and is now deprecated.
+* (T146591) The lc_lang_key index on the l10n_cache table has been changed into a
+ PRIMARY KEY.
+* (T157227) bot_password.bp_user, change_tag.ct_log_id, change_tag.ct_rev_id,
+ page_restrictions.pr_user, tag_summary.ts_log_id, tag_summary.ts_rev_id and
+ user_properties.up_user have all been made unsigned on MySQL.
+* DB_SLAVE is deprecated. DB_REPLICA should be used instead.
+* wfUsePHP() is deprecated.
+* wfFixSessionID() was removed.
+* wfShellExec() and related functions are deprecated, use Shell::command().
+* (T138166) SpecialEmailUser::getTarget() now requires a second argument, the sending
+ user object. Using the method without the second argument is deprecated.
+* (T67297) Browsers that don't support Unicode will have their edits rejected.