account: Correct can_wiki permissions for trac.

Trac requires None to map to False, where as in new wiki it maps to True

r2/r2/controllers/front.py

@@ -1228,7 +1228,8 @@ class FormsController(RedditController):
         returns their user name"""
         c.response_content_type = 'text/plain'
         if c.user_is_loggedin:
-            perm = str(c.user.can_wiki())
+            # Change cookie based on can_wiki trac permissions
+            perm = str(c.user.can_wiki(default=False))
             c.response.content = c.user.name + "," + perm
         else:
             c.response.content = ''

r2/r2/controllers/validator/wiki.py

@@ -88,7 +88,7 @@ def may_revise(sr, user, page=None):
         # Users who are not allowed to view the page may not contribute to the page
         return False
     
-    if not user.can_wiki():
+    if not user.can_wiki(default=True):
         # Global wiki contributute ban
         return False
     

r2/r2/models/account.py

@@ -182,9 +182,11 @@ class Account(Thing):
         karma = self.link_karma
         return max(karma, 1) if karma > -1000 else karma
 
-    def can_wiki(self):
+    def can_wiki(self, default=False):
         if self.wiki_override is None:
-            return self.link_karma > 100 or self.comment_karma > 100
+            if not default:
+                return self.link_karma > 100 or self.comment_karma > 100
+            return default
         return self.wiki_override
 
     def all_karmas(self):