Es cluster settings about "ALL" "all"?

[zqc0512 (andy_zhou)]

es cluster settings about "ALL" "all"?
es 5.3.6
the cluster setting about rebalance is same ?
as
"cluster.routing.rebalance.enable": "ALL" and "cluster.routing.rebalance.enable": "all"
which the default use "ALL" or "all"?

[warkolm (Mark Walkom)]

https://www.elastic.co/guide/en/elasticsearch/reference/5.6/shards-allocation.html#_shard_rebalancing_settings says all.