1 files changed, 15 insertions, 69 deletions
diff --git a/actioncable/CHANGELOG.md b/actioncable/CHANGELOG.md
index 5162a31cf8..5b9cc84c09 100644
--- a/actioncable/CHANGELOG.md
+++ b/actioncable/CHANGELOG.md
@@ -1,81 +1,27 @@
-*   WebSocket protocol negotiation.
+*   Removed deprecated evented redis adapter.
 
-    Introduces an Action Cable protocol version that moves independently
-    of and, hopefully, more slowly than Action Cable itself. Client sockets
-    negotiate a protocol with the Cable server using WebSockets' native
-    subprotocol support:
-      * https://tools.ietf.org/html/rfc6455#section-1.9
-      * https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_servers#Subprotocols
+    *Rafael Mendonça França*
 
-    If they can't negotiate a compatible protocol (usually due to upgrading
-    the Cable server with a browser still running old JavaScript) then the
-    client knows to disconnect, cease retrying, and tell the app that it hit
-    a protocol mismatch.
-
-    This allows us to evolve the Action Cable message format, handshaking,
-    pings, acknowledgements, and more without breaking older clients'
-    expectations of server behavior.
-
-    *Daniel Rhodes*
-
-*   Pubsub: automatic stream decoding.
-
-        stream_for @room, coder: ActiveSupport::JSON do |message|
-          # `message` is a Ruby hash here instead of a JSON string
-
-    The `coder` must respond to `#decode`. Defaults to `coder: nil`
-    which skips decoding entirely.
+*   Support redis-rb 4.0.
 
     *Jeremy Daer*
 
-*   Add ActiveSupport::Notifications to ActionCable::Channel.
-
-    *Matthew Wear*
-
-*   Safely support autoloading and class unloading, by preventing concurrent
-    loads, and disconnecting all cables during reload.
-
-    *Matthew Draper*
-
-*   Ensure ActionCable behaves correctly for non-string queue names.
-
-    *Jay Hayes*
-
-## Rails 5.0.0.beta3 (February 24, 2016) ##
-
-*   Added `em_redis_connector` and `redis_connector` to
-   `ActionCable::SubscriptionAdapter::EventedRedis` and added `redis_connector`
-    to `ActionCable::SubscriptionAdapter::Redis`, so you can overwrite with your
-    own initializers. This is used when you want to use different-than-standard
-    Redis adapters, like for Makara distributed Redis.
-
-    *DHH*
-
-## Rails 5.0.0.beta2 (February 01, 2016) ##
-
-*   Support PostgreSQL pubsub adapter.
-
-    *Jon Moss*
-
-*   Remove EventMachine dependency.
-
-    *Matthew Draper*
+*   Hash long stream identifiers when using PostgreSQL adapter.
 
-*   Remove Celluloid dependency.
+    PostgreSQL has a limit on identifiers length (63 chars, [docs](https://www.postgresql.org/docs/current/static/sql-syntax-lexical.html#SQL-SYNTAX-IDENTIFIERS)).
+    Provided fix minifies identifiers longer than 63 chars by hashing them with SHA1.
 
-    *Mike Perham*
+    Fixes #28751.
 
-*   Create notion of an `ActionCable::SubscriptionAdapter`.
-    Separate out Redis functionality into
-    `ActionCable::SubscriptionAdapter::Redis`, and add a
-    PostgreSQL adapter as well. Configuration file for
-    ActionCable was changed from`config/redis/cable.yml` to
-    `config/cable.yml`.
+    *Vladimir Dementyev*
 
-    *Jon Moss*
+*   Action Cable's `redis` adapter allows for other common redis-rb options (`host`, `port`, `db`, `password`) in cable.yml.
 
-## Rails 5.0.0.beta1 (December 18, 2015) ##
+    Previously, it accepts only a [redis:// url](https://www.iana.org/assignments/uri-schemes/prov/redis) as an option.
+    While we can add all of these options to the `url` itself, it is not explicitly documented. This alternative setup
+    is shown as the first example in the [Redis rubygem](https://github.com/redis/redis-rb#getting-started), which
+    makes this set of options as sensible as using just the `url`.
 
-*   Added to Rails!
+    *Marc Rendl Ignacio*
 
-    *DHH*
+Please check [5-1-stable](https://github.com/rails/rails/blob/5-1-stable/actioncable/CHANGELOG.md) for previous changes.