Search redirects.

Change-Id: I9d8d017b776ef8c006d070130784983d507acda4
Pick up redirect changes while reindexing.

Note that we don't pick up redirect changes while bootstrapping.

Change-Id: Ia36193b82e63fa8e57ff2b2fd0e82d9c93de92bb
Stop removing restored pages from the index.

This would only happen if the forceSearchIndex.php saw a restore log.
Now it ignores them.

Change-Id: I036d5039b49f2fe13d5c59f45f6380b83ba365c1