title: Sidekiq Doesn't Create a PID file
body: <p>In order to stop Sidekiq I need to use:</p>
  
  <p><code>$bundle exec sidekiqctl stop /Users/me/Documents/sites/some_site/tmp/pid/sidekiq.pid 20</code></p>
  
  <p>I am telling Sidekiq to create a pid file in a config.yml file:</p>
  
  <pre><code>#/Users/me/Documents/sites/some_site/config.yml
  :pidfile: /Users/me/Documents/sites/some_site/tmp/pids/sidekiq.pid
  :concurrency: 25
  </code></pre>
  
  <p>And telling Sidekiq where this config file is using:</p>
  
  <p><code>$ bundle exec sidekiq -C /Users/me/Documents/sites/some_site/config.yml</code></p>
  
  <p><strong>However when I run Sidekiq it does not create a .pid file, so I can't stop it. So why doesn't it create a .pid file?</strong></p>