CALLBACK is called when the object has been completely retrieved, with
the current buffer containing the object, and any MIME headers associated
-with it. It is called as (apply CALLBACK STATUS CBARGS), where STATUS
-is a list with an even number of elements representing what happened
-during the request, with most recent events first. Each pair is one
-of:
+with it. It is called as (apply CALLBACK STATUS CBARGS).
+STATUS is a list with an even number of elements representing
+what happened during the request, with most recent events first,
+or an empty list if no events have occurred. Each pair is one of:
\(:redirect REDIRECTED-TO) - the request was redirected to this URL
\(:error (ERROR-SYMBOL . DATA)) - an error occurred. The error can be