Merge "Deprecate overriding SearchEngine::search*"

diff --cc RELEASE-NOTES-1.32
Simple merge

diff --cc includes/search/SearchEngine.php
Simple merge

diff --cc includes/search/SearchMssql.php
Simple merge

diff --cc includes/search/SearchMySQL.php
Simple merge

diff --cc includes/search/SearchOracle.php
Simple merge

diff --cc includes/search/SearchPostgres.php
Simple merge

diff --cc includes/search/SearchSqlite.php
Simple merge