update docs

Author: Sean Sain

website/docs/r/collector.html.markdown

@@ -19,21 +19,21 @@ resource "sumologic_collector" "collector" {
 }
 ```
 
-## Argument reference
+## Argument Reference
 
 The following arguments are supported:
 
-- `name` - (Required) The name of the collector. This is required, and has to be unique. Changing this will force recreation the collector.
-- `description` - (Optional) The description of the collector.
-- `category` - (Optional) The default source category for any source attached to this collector. Can be overridden in the configuration of said sources.
-- `timezone` - (Optional) The time zone to use for this collector. The value follows the [tzdata][2] naming convention.
-- `fields` - (Optional) Map containing [key/value pairs][3]. 
-- `lookup_by_name` - (Optional) Configures an existent collector using the same 'name' or creates a new one if non existent. Defaults to false.
-- `destroy` - (Optional) Whether or not to delete the collector in Sumo when it is removed from Terraform.  Defaults to true.
+  * `name` - (Required) The name of the collector. This is required, and has to be unique. Changing this will force recreation the collector.
+  * `description` - (Optional) The description of the collector.
+  * `category` - (Optional) The default source category for any source attached to this collector. Can be overridden in the configuration of said sources.
+  * `timezone` - (Optional) The time zone to use for this collector. The value follows the [tzdata][2] naming convention.
+  * `fields` - (Optional) Map containing [key/value pairs][3]. 
+  * `lookup_by_name` - DEPRECATED - Use the data source or import the collector - (Optional) Configures an existent collector using the same 'name' or creates a new one if non existent. Defaults to false.
+  * `destroy` - DEPRECATED - Use lifecycle management attribute [`prevent_destroy`][4] - (Optional) Whether or not to delete the collector in Sumo when it is removed from Terraform.  Defaults to true.
 
 The following attributes are exported:
 
-- `id` - The internal ID of the collector. This can be used to attach sources to the collector.
+  * `id` - The internal ID of the collector. This can be used to attach sources to the collector.
 
 ## Import
 Collectors can be imported using the collector id, e.g.:
@@ -54,3 +54,4 @@ terraform import sumologic_collector.test my_test_collector
 [1]: https://help.sumologic.com/Send_Data/Hosted_Collectors
 [2]: https://en.wikipedia.org/wiki/Tz_database
 [3]: https://help.sumologic.com/Manage/Fields
+[4]: https://www.terraform.io/docs/configuration/resources.html#prevent_destroy