title: Mailchimp API v3.0 add pending member without confirmation email
body: <p>I am executing a curl call via php to Mailchimp API v3.0.
  When a user sign up to my cms, I sent him a confirmation email and add a member to a specific Mailchimp list, calling this URL:</p>
  
  <pre><code>'https://us11.api.mailchimp.com/3.0/lists/'.$list_id.'/members/';
  </code></pre>
  
  <p>passing those parameters:</p>
  
  <pre><code>$data = array(
      'apikey'            =&gt; $apikey,
      'email_address'     =&gt; $mailchimp_user['email'],
      'status'            =&gt; 'pending',
      'update_existing'   =&gt; true,
      'send_welcome'      =&gt; false,
      'double_optin'      =&gt; false,
      'merge_fields'      =&gt; array(
          'FNAME'             =&gt; $mailchimp_user['FNAME'],
          'LNAME'             =&gt; $mailchimp_user['LNAME']
      )
  );
  </code></pre>
  
  <p>The Mailchimp pending subscription is successful.
  When the user click in the confirmation email sent from my cms, with another curl (PATCH method) call, I can easily update the member status to 'subscribed'. 
  So I can manage all the Mailchimp subscription from my cms, without any Mailchimp default behavior and layouts.  </p>
  
  <p><strong>But the default Mailchimp Confirmation email is never sent to the user, even if the 'double_optin' param is false.</strong>  </p>
  
  <p>I noticed that if I set the member status to 'unsubscribed' the user did not receive the confirmation email. But it is logically wrong!
  I'd like that the two steps for Mailchimp subscription should be<br>
  <em>pending -> subscribed</em><br>
  and not<br>
  <em>unsubscribed -> subscribed</em>.</p>
  
  <p>Can I do something about it?</p>