From 1c1d9221c82e5c52763ef8133a1bfe4616cd81e7 Mon Sep 17 00:00:00 2001
From: Jakub Warmuz <jakub@warmuz.org>
Date: Mon, 24 Nov 2014 02:23:27 +0100
Subject: [PATCH] py26 doesn't support set {} constructor. Use frozenset.

---
 letsencrypt/client/CONFIG.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/letsencrypt/client/CONFIG.py b/letsencrypt/client/CONFIG.py
index bccfc777f..1c11510c1 100644
--- a/letsencrypt/client/CONFIG.py
+++ b/letsencrypt/client/CONFIG.py
@@ -52,10 +52,10 @@ INVALID_EXT = ".acme.invalid"
 CHALLENGE_PREFERENCES = ["dvsni", "recoveryToken"]
 
 # Mutually Exclusive Challenges - only solve 1
-EXCLUSIVE_CHALLENGES = [set(["dvsni", "simpleHttps"])]
+EXCLUSIVE_CHALLENGES = [frozenset(["dvsni", "simpleHttps"])]
 
 # These are challenges that must be solved by a Configurator object
-CONFIG_CHALLENGES = {"dvsni", "simpleHttps"}
+CONFIG_CHALLENGES = frozenset(["dvsni", "simpleHttps"])
 
 # Rewrite rule arguments used for redirections to https vhost
 REWRITE_HTTPS_ARGS = [