Nik Everett 02761f5fe0 Docs: migration notes for _timestamp and _ttl
We aren't able to actually create an index with _timestamp enabled
to test the migration, or, at least, we won't be able to after #18980
is re-merged. But the docs are still ok.

Closes #19007
2016-06-22 14:43:12 -04:00
..
2016-06-07 10:13:48 -06:00
2016-04-25 13:06:57 +02:00
2016-06-21 16:02:25 +02:00
2016-05-24 13:28:20 +02:00