Bind to interface only, if specified

Usually when someone specifies an interface to bind, it means
the service is required to bind to that interface instead of all.

Since dnsmasq doesn't bind like that by default, this additional
option is required.

Fixing Gemfile

Fixing rake version in Gemfile

Removing dupe line in Rakefile

Fixing missing dependency

Use newer ruby

Adjust rake version

Drop old puppet, add newest 3.8

.travis.yml

@@ -1,8 +1,8 @@
-rvm: 1.8.7
+rvm: 1.9.3
 notifications:
   email:
     - [email protected]
 env:
-  - PUPPET_VERSION=2.7.11
   - PUPPET_VERSION=3.1.1
   - PUPPET_VERSION=3.7.0
+  - PUPPET_VERSION=3.8.7

Gemfile

@@ -4,8 +4,6 @@ source "https://rubygems.org"
 puppet_version = ENV.key?('PUPPET_VERSION') ? "= #{ENV['PUPPET_VERSION']}" : \
   '= 3.7.2' # from puppet enterprise 3.7.0
 
-gem 'rake'
-gem 'rspec', '< 3.0.0'
 gem 'puppet-lint'
 gem 'rspec-puppet'
 gem 'puppetlabs_spec_helper'
@@ -16,4 +14,9 @@ if RUBY_VERSION >= '1.8.7' and RUBY_VERSION < '1.9'
   # rake >=11 does not support ruby 1.8.7
   gem 'rspec', '~> 2.0'
   gem 'rake', '~> 10.0'
+  gem 'json', '= 1.8'
+else
+  gem 'rspec', '< 3.0.0'
+  gem 'rake', '< 11.0'
+  gem 'json'
 end

Rakefile

@@ -1,7 +1,7 @@
 require 'rake'
+require 'json'
 
 require 'rspec/core/rake_task'
-require 'puppet-lint/tasks/puppet-lint'
 
 require 'puppetlabs_spec_helper/rake_tasks'
 require 'puppet-lint/tasks/puppet-lint'

templates/dnsmasq.conf.erb

@@ -66,6 +66,7 @@ listen-address=<%= addr %>
 <% end -%>
 <% end -%>
 <% if @interface -%>
+bind-interfaces
 <% Array(@interface).compact.each do |iface| -%>
 interface=<%= iface %>
 <% end -%>