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Unknown cipher in list: TLSv1

In downloader/lib/Mage/HTTP/Client/Curl.php, try changing:
$this->curlOption(CURLOPT_SSL_CIPHER_LIST, 'TLSv1');
to
$this->curlOption(CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
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SEND INSTANT ORDER EMAILS
//app/code/core/Mage/Sales/Model/Order.php Line#1356,1450 
  //$mailer->setQueue($emailQueue)->send(); Change To 

          $mailer->send();