Allowed characters in paths (#6015)

website/source/api/system/auth.html.md

@@ -69,6 +69,8 @@ For example, enable the "foo" auth method will make it accessible at
 - `path` `(string: <required>)` – Specifies the path in which to enable the auth
   method. This is part of the request URL.
 
+    !> **NOTE:** Use ASCII printable characters to specify the desired path.
+
 - `description` `(string: "")` – Specifies a human-friendly description of the
   auth method.
 

website/source/api/system/mounts.html.md

@@ -70,6 +70,8 @@ This endpoint enables a new secrets engine at the given path.
 - `path` `(string: <required>)` – Specifies the path where the secrets engine
   will be mounted. This is specified as part of the URL.
 
+    !> **NOTE:** Use ASCII printable characters to specify the desired path.
+
 - `type` `(string: <required>)` – Specifies the type of the backend, such as
   "aws".