Turned REPLACE statements into INSERT..ON DUPLICATE KEY UPDATE in db/install.php

qa-include/db/install.php

@@ -595,7 +595,11 @@
 	Set the current version in the database
 */
 	{
-		qa_db_query_sub("REPLACE ^options (title,content) VALUES ('db_version', #)", $version);
+		qa_db_query_sub(
+			"INSERT INTO ^options (title, content) VALUES ('db_version', #) " .
+			"ON DUPLICATE KEY UPDATE content = VALUES(content)",
+			$version
+		);
 	}