title: rails, Cannot run sidekiq
body: <p>I have created <code>sidekiq.yml</code> file inside config folder:</p>
  
  <pre><code>---
  :concurrency: 25
  :pidfile: ./tmp/pids/sidekiq.pid
  :logfile: ./log/sidekiq.log
  :queues:
    -default
  </code></pre>
  
  <p>I have added <code>foreman</code> gem in my Rails project and created Procfile in my root folder:</p>
  
  <pre><code>web: bundle exec rails s
  worker: sidekiq -C config/sidekiq.yml
  </code></pre>
  
  <p>When I run foreman in my command line it just does not want to start. Messages are:</p>
  
  <pre><code>C:\Users\lenovo\RubymineProjects\new-seeker-test&gt;foreman start
  11:41:39 web.1    | started with pid 8088
  11:41:39 worker.1 | started with pid 7920
  11:41:40 web.1    | DL is deprecated, please use Fiddle
  11:41:40 worker.1 | undefined method `each' for "-default":String
  11:41:40 worker.1 | D:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/sidekiq-   3.3.4/lib/sidekiq/cli.rb:378:in `parse_queues'
  11:41:40 worker.1 | D:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/sidekiq-  3.3.4/lib/sidekiq/cli.rb:363:in `parse_config'
  11:41:40 worker.1 | D:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/sidekiq-3.3.4/lib/sidekiq/cli.rb:212:in `setup_options'
  11:41:40 worker.1 | D:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/sidekiq-3.3.4/lib/sidekiq/cli.rb:38:in `parse'
  11:41:40 worker.1 | D:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/sidekiq-3.3.4/bin/sidekiq:7:in `&lt;top (required)&gt;'
  11:41:40 worker.1 | D:/Ruby21-x64/bin/sidekiq:23:in `load'
  11:41:40 worker.1 | D:/Ruby21-x64/bin/sidekiq:23:in `&lt;main&gt;'
  11:41:40 worker.1 | exited with code 1
  11:41:40 system   | sending SIGKILL to all processes
  11:41:40 system   | sending SIGKILL to web.1 at pid 8088
  11:41:40 web.1    | exited with code 0
  </code></pre>
  
  <p>I think there is something on <code>11:41:40 worker.1 | undefined method 'each' for "-default":String</code></p>
  
  <p>My ruby version is 2.1.5
  Rails version is 4.2.0
  Windows 7 x64</p>