fixed source docs (#777)

docs/source/README.md

@@ -64,7 +64,7 @@ Or if you want to run the latest version from this repo, you can use [`ko`](http
 - Install the `ko` CLI for building and deploying purposes.
 
    ```shell script
-   go get github.com/google/go-containerregistry/cmd/ko
+   go install github.com/google/ko@latest
    ```
 
 - Configure container registry, such as a Docker Hub account, is required.
@@ -97,6 +97,8 @@ spec:
     secretKeyRef:
       name: rabbitmq-default-user
       key: password
+  connectionSecret:
+    name: rabbitmq-default-user # used when exchange and queue are not predeclared
   channelConfig:
     globalQos: false
   exchangeConfig:
@@ -115,7 +117,9 @@ EOF
 
 ## Published Events
 
-All messages received by the source are published with the following schema:
+All messages received by the source are published in binary mode with the following schema:
+
+If it is already a CloudEvent, the message is forwarded in binary mode. If it isn't:
 
 Event attributes
 | Attribute | Value  | Notes  |
@@ -124,8 +128,8 @@ Event attributes
 | `source` | `/apis/v1/namespace/*$NS*/rabbitmqsources/*$NAME*#*$QUEUE_NAME*` | `NS`, `NAME` and `QUEUE_NAME` are derived from the source configuration |
 | `id` | A unique ID | This uses the `MessageId` if available, and a UUID otherwise |
 | `subject` | The ID of the message | Empty string if no message ID is present |
-| `datacontenttype` | `application/json` | Currently static |
-| `key` | The ID of the message | Empty string if no message ID is present |
+| `content-type` | Extracted from the RabbitMQ `MessageContentType` | Any valid Content Type  |
+| `time` | A timestamp | This uses the `MessageTimestamp` if Available |
 
 The payload of the event is set to the data content of the message.
 
@@ -149,9 +153,8 @@ The source sends the following event content:
   "source": "/apis/v1/namespaces/default/rabbitmqsources/rabbitmq-source",
   "id": "f00c1f52-33a1-4d3d-993f-750f20c804da",
   "time": "2020-12-18T01:15:20.450860898Z",
-  "subject": "",
+  "subject": "f00c1f52-33a1-4d3d-993f-750f20c804da",
   "datacontenttype": "application/json",
-  "key": "",
   "data": "Hello rabbitmq!"
 }
 ```
@@ -164,11 +167,15 @@ Sources are Kubernetes objects. In addition to the standard Kubernetes
 Source parameters
 | Field  | Value  |
 |--------|--------|
-| `spec.broker` | Host+Port of the Broker, with a trailing "/" |
-| `spec.vhost` * | VHost where the source resources are located |
-| `spec.predeclared` | Defines if the source should try to create new queue or use predeclared one (Boolean) |
+| `broker` | Host+Port of the Broker, with a trailing "/" |
+| `vhost` * | VHost where the source resources are located |
+| `predeclared` | Defines if the source should try to create new queue or use predeclared one (Boolean) |
+| `backoffPolicy` | The backoff policy type (linear, exponential) String |
+| `backoffDelay` | Is the delay to be used before retrying by the backoff policy (String) |
+| `retry` | Number of retries to be used by the backoff policy  (Int) |
 | `user.secretKeyRef` | Username for Broker authentication; field `key` in a Kubernetes Secret named `name` |
 | `password.secretKeyRef` | Password for Broker authentication; field `key` in a Kubernetes Secret named `name` |
+| `connectionSecret` | The name of the RabbitMQ secret |
 | `exchangeConfig` | Settings for the exchange |
 | `exchangeConfig.name` * | Name of the exchange |
 | `exchangeConfig.type` | [Exchange type](https://www.rabbitmq.com/tutorials/amqp-concepts.html#exchanges). Can be `fanout`, `direct`, `topic`, `match` or `headers` |
@@ -182,6 +189,7 @@ Source parameters
 | `channelConfig.parallelism` * | Int that sets the [Consumer Prefetch Value](https://www.rabbitmq.com/consumer-prefetch.html) and creates `n` parallel consumer processes. Default value is `1`. Value must be between `1` and `1000`. With a value of `1` the RabbitMQ Source process events in FIFO order, values above `1` break message ordering guarantees and can be seen as more performance oriented. |
 | `channelConfig.globalQos` * | Boolean defining how the [Consumer Sharing Limit](https://www.rabbitmq.com/consumer-prefetch.html#sharing-the-limit) is handled. |
 | `sink` | A reference to an [Addressable](https://knative.dev/docs/eventing/#event-consumers) Kubernetes object |
+| `serviceAccountName` | The service account name to be used by the Receive Adapter deployments generated by the Source |
 
 `*` These attributes are optional.
 
@@ -195,6 +203,8 @@ kubectl create secret generic rabbitmq-secret \
   --from-file=password=/tmp/password
 ```
 
+* To edit the Source's default user secret and add the the RabbitMQ http uri, see the [Source's samples Readme](../../samples/source/README.md)
+
 Note that many parameters do not need to be specified. Unspecified optional
 parameters will be defaulted to `false` or `""` (empty string).