Jason Tedor 669fcd05e6 Add note to docs on duplicate keys in config
This commit adds a note to the migration docs that duplicate keys in the
configuration file are no longer permitted.

Relates #24022
2017-04-10 10:58:59 -04:00
..
2017-04-02 11:17:14 -04:00
2017-03-22 10:44:11 +01:00
2016-10-11 12:21:46 +02:00