Get rid of more API URLs spread about the codebase.

src/General/Build.Test.coffee

@@ -65,7 +65,7 @@ Build.Test =
 
   testOne: (post) ->
     Build.Test.postsRemaining++
-    $.cache "#{location.protocol}//a.4cdn.org/#{post.board.ID}/thread/#{post.thread.ID}.json", ->
+    $.cache Site.urls.threadJSON({boardID: post.boardID, threadID: post.threadID}), ->
       return unless @response
       {posts} = @response
       Build.spoilerRange[post.board.ID] = posts[0].custom_spoiler

src/Miscellaneous/ExpandComment.coffee

@@ -26,7 +26,7 @@ ExpandComment =
       return
     return if not (a = $ '.abbr > a', post.nodes.comment)
     a.textContent = "Post No.#{post} Loading..."
-    $.cache "#{location.protocol}//a.4cdn.org#{a.pathname.split(/\/+/).splice(0,4).join('/')}.json", -> ExpandComment.parse @, a, post
+    $.cache Site.urls.threadJSON({boardID: post.boardID, threadID: post.threadID}), -> ExpandComment.parse @, a, post
 
   contract: (post) ->
     return unless post.nodes.shortComment

src/Monitoring/ThreadUpdater.coffee

@@ -138,7 +138,7 @@ ThreadUpdater =
             ThreadUpdater.setInterval()
         when 404
           # XXX workaround for 4chan sending false 404s
-          $.ajax "#{location.protocol}//a.4cdn.org/#{ThreadUpdater.thread.board}/catalog.json", onloadend: ->
+          $.ajax Site.urls.catalogJSON({boardID: ThreadUpdater.thread.board.ID}), onloadend: ->
             if @status is 200
               confirmed = true
               for page in @response

src/classes/Fetcher.coffee

@@ -16,7 +16,7 @@ class Fetcher
     @root.textContent = "Loading post No.#{@postID}..."
     if @threadID
       that = @
-      $.cache "#{location.protocol}//a.4cdn.org/#{@boardID}/thread/#{@threadID}.json", ({isCached}) ->
+      $.cache Site.urls.threadJSON({boardID: @boardID, threadID: @threadID}), ({isCached}) ->
         that.fetchedPost @, isCached
     else
       @archivedPost()
@@ -81,7 +81,7 @@ class Fetcher
     if post.no isnt @postID
       # Cached requests can be stale and must be rechecked.
       if isCached
-        api = "#{location.protocol}//a.4cdn.org/#{@boardID}/thread/#{@threadID}.json"
+        api = Site.urls.threadJSON({boardID: @boardID, threadID: @threadID})
         $.cleanCache (url) -> url is api
         that = @
         $.cache api, ->

src/site/SW.yotsuba.coffee

@@ -98,7 +98,7 @@ SW.yotsuba =
 
     if g.BOARD.ID is 'f' and thread.OP.file
       {file} = thread.OP
-      $.ajax "#{location.protocol}//a.4cdn.org/f/thread/#{thread}.json",
+      $.ajax Site.urls.threadJSON({boardID: 'f', threadID: thread.ID}),
         timeout: $.MINUTE
         onloadend: ->
           if @response