Lee Hinman f18ec511ca Disallow : in cluster and index/alias names (#26247)
We use `:` for cross-cluster search (eg `cluster:index`), therefore, we should
not allow the ambiguity when allowing cluster or index names.

Relates to #23892
2017-08-17 14:57:26 -06:00

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[[breaking_70_indices_changes]]
=== Indices changes
==== `:` is no longer allowed in index name
Due to cross-cluster search using `:` to separate a cluster and index name,
index names may no longer contain `:`.