More content hooks for the wiki template.

(And remove a bogus leftover definition.)

collects/meta/web/stubs/wiki.rkt

@@ -4,12 +4,8 @@
 
 (define-context "stubs/wiki" #:resources www:the-resources)
 
-(define header+footer
-  (delay (regexp-split #rx"{{{BODY}}}"
-                       (xml->string @page[#:id 'browse-downloads
-                                          #:html-only #t
-                                          #:part-of 'download
-                                          "{{{BODY}}}"]))))
-
 (define template
-  @page[#:title "{{{TITLE}}}" "{{{BODY}}}"])
+  (page #:title "{{{TITLE}}}"
+        #:extra-headers "{{{HEADERS}}}"
+        #:extra-body-attrs '(|{{{ATTRS}}}|: #t)
+        "{{{BODY}}}"))