Don't prune data for threads on kissu.moe while they're in the archive, take 2, using archive.json.

src/classes/DataBoard.coffee

@@ -141,7 +141,7 @@ class DataBoard
       return that.ajaxCleanParse(boardID, @response) unless archiveList
       response1 = @response
       $.cache archiveList, ->
-        return unless @status is 200
+        return unless @status is 200 or (!g.SITE.archivedBoardsKnown and @status is 404)
         that.ajaxCleanParse(boardID, response1, @response)
 
   ajaxCleanParse: (boardID, response1, response2) ->

src/site/SW.tinyboard.coffee

@@ -54,6 +54,9 @@ SW.tinyboard =
     threadsListJSON: ({siteID, boardID}) ->
       root = Conf['siteProperties'][siteID]?.root
       if root then "#{root}#{boardID}/threads.json" else ''
+    archiveListJSON: ({siteID, boardID}) ->
+      root = Conf['siteProperties'][siteID]?.root
+      if root then "#{root}#{boardID}/archive/archive.json" else ''
     catalogJSON: ({siteID, boardID}) ->
       root = Conf['siteProperties'][siteID]?.root
       if root then "#{root}#{boardID}/catalog.json" else ''

src/site/SW.yotsuba.coffee

@@ -1,6 +1,7 @@
 SW.yotsuba =
   isOPContainerThread: false
   hasIPCount: true
+  archivedBoardsKnown: true
 
   urls:
     thread:     ({boardID, threadID}) -> "#{location.protocol}//#{BoardConfig.domain(boardID)}/#{boardID}/thread/#{threadID}"