Merge "Drop archive.ar_text and ar_flags"

diff --cc RELEASE-NOTES-1.31
Simple merge

diff --cc includes/Revision.php
Simple merge

diff --cc includes/Storage/RevisionStore.php
Simple merge

diff --cc includes/installer/DatabaseUpdater.php
Simple merge

diff --cc includes/page/WikiPage.php
Simple merge

diff --cc maintenance/mssql/tables.sql
Simple merge

diff --cc maintenance/oracle/tables.sql
Simple merge

diff --cc maintenance/postgres/tables.sql
Simple merge

diff --cc maintenance/tables.sql
Simple merge

diff --cc tests/phpunit/includes/RevisionTest.php
Simple merge