fixup: client shutdown

Signed-off-by: Todd Baert <todd.baert@dynatrace.com>

specification.json

@@ -230,7 +230,14 @@
         {
             "id": "Requirement 1.6.1",
             "machine_id": "requirement_1_6_1",
-            "content": "The API MUST define a `shutdown` function, which, when called, must call the respective `shutdown` function on the active provider.",
+            "content": "The API MUST define a `shutdown` function which, when called, must call the respective `shutdown` function on the active provider.",
+            "RFC 2119 keyword": "MUST",
+            "children": []
+        },
+        {
+            "id": "Requirement 1.6.2",
+            "machine_id": "requirement_1_6_2",
+            "content": "The client MUST define a `shutdown` function which, when called, removes all the event handlers associated with that client.",
             "RFC 2119 keyword": "MUST",
             "children": []
         },

specification/sections/01-flag-evaluation.md

@@ -274,9 +274,16 @@ See [hooks](./04-hooks.md) for details.
 
 #### Requirement 1.6.1
 
-> The API **MUST** define a `shutdown` function, which, when called, must call the respective `shutdown` function on the active provider.
+> The API **MUST** define a `shutdown` function which, when called, must call the respective `shutdown` function on the active provider.
 
 The precise name of this function is not prescribed by this specification, but should be defined be the SDK.
 Relevant language idioms should be considered when choosing the name for this function, in accordance with the resource-disposal semantics of the language in question.
 
 see: [`shutdown`](./02-providers.md#25-shutdown)
+
+#### Requirement 1.6.2
+
+> The client **MUST** define a `shutdown` function which, when called, removes all the event handlers associated with that client.
+
+The precise name of this function is not prescribed by this specification, but should be defined be the SDK.
+Relevant language idioms should be considered when choosing the name for this function, in accordance with the resource-disposal semantics of the language in question.