Alexander Reelsen 23cf9af495 Dates: Be backwards compatible with pre 2.x indices
In order to be backwards compatible, indices created before 2.x must support
indexing of a unix timestamp and its configured date format. Indices created
with 2.x must configure the `epoch_millis` date formatter in order to
support this.

Relates #10971
2015-06-25 17:21:29 +02:00
..
2015-05-05 10:38:05 +02:00