Only support tls version 1.1
Only support tls version 1.1

Erlang/OTP can only handle certain hashing functions and apple has
changed there. The current fix is to only support tlsv1.1.

http://erlang.org/pipermail/erlang-questions/2015-June/084935.html

br/apns4erl,irccloud/apns4erl,br/apns4erl,comtihon/apns4erl,Soulforged/apns4erl,tomekowal/apns4erl,scatterbrain/apns4erl,arjan/apns4erl,rmoorman/apns4erl