Subreddit routing: add /about/sticky redirect

Redirects to the subreddit's current sticky post

r2/r2/config/routing.py

@@ -141,6 +141,7 @@ def make_map():
           requirements=dict(controller="hot|new|rising|randomrising"))
 
     mc('/about/sidebar', controller='front', action='sidebar')
+    mc('/about/sticky', controller='front', action='sticky')
     mc('/about/flair', controller='front', action='flairlisting')
     mc('/about', controller='front', action='about')
     mc('/comments/gilded', controller='redirect', action='gilded_comments',

r2/r2/controllers/front.py

@@ -752,6 +752,14 @@ class FrontController(RedditController, OAuth2ResourceController):
         usertext = UserText(c.site, c.site.description)
         return Reddit(content=usertext).render()
 
+    @require_oauth2_scope("read")
+    def GET_sticky(self):
+        if c.site.sticky_fullname:
+            sticky = Link._by_fullname(c.site.sticky_fullname, data=True)
+            self.redirect(sticky.make_permalink_slow())
+        else:
+            abort(404)
+
     def GET_awards(self):
         """The awards page."""
         return BoringPage(_("awards"), content=UserAwards()).render()