Make R16B03-1 the minimal reguired otp version

.travis.yml

@@ -1,8 +1,8 @@
 language: erlang
 
 otp_release:
+  - 17.4
   - R16B03
-  - R15B01
 
 services:
   - riak

README

@@ -106,7 +106,7 @@ To compile ejabberd you need:
  - GCC.
  - Libexpat 1.95 or higher.
  - Libyaml 0.1.4 or higher.
- - Erlang/OTP R15B or higher.
+ - Erlang/OTP R16B03 or higher.
  - OpenSSL 0.9.8 or higher, for STARTTLS, SASL and SSL encryption.
  - Zlib 1.2.3 or higher, for Stream Compression support (XEP-0138). Optional.
  - PAM library. Optional. For Pluggable Authentication Modules (PAM).

rebar.config.script

@@ -6,6 +6,9 @@
 %%% @end
 %%% Created :  1 May 2013 by Evgeniy Khramtsov <ekhramtsov@process-one.net>
 %%%-------------------------------------------------------------------
+
+{require_min_otp_vsn, "16"}.
+
 Cfg = case file:consult("vars.config") of
           {ok, Terms} ->
               Terms;