title: curl https://cpanmin.us fails on CentOS 7
body: <pre><code>$ docker run centos:7.1.1503 curl  https://cpanmin.us
    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                   Dload  Upload   Total   Spent    Left  Speed
    0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  curl: (35) Cannot communicate securely with peer: no common encryption algorithm(s).
  </code></pre>
  
  <p>I know we can use the direct URL <a href="https://raw.githubusercontent.com/miyagawa/cpanminus/master/cpanm" rel="nofollow">https://raw.githubusercontent.com/miyagawa/cpanminus/master/cpanm</a> which works fine.</p>
  
  <p>What I want to know is that what is the cause of this error and how to solve it.</p>
  
  <p>Below is the output of -vvv option.</p>
  
  <pre><code>$ docker run centos:7.1.1503 curl -vvvv  https://cpanmin.us
    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                   Dload  Upload   Total   Spent    Left  Speed
    0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0* About to connect() to cpanmin.us port 443 (#0)
  *   Trying 104.28.29.17...
  * Connected to cpanmin.us (104.28.29.17) port 443 (#0)
  * Initializing NSS with certpath: sql:/etc/pki/nssdb
  *   CAfile: /etc/pki/tls/certs/ca-bundle.crt
    CApath: none
  * NSS error -12286 (SSL_ERROR_NO_CYPHER_OVERLAP)
  * Cannot communicate securely with peer: no common encryption algorithm(s).
  * Error in TLS handshake, trying SSLv3...
  &gt; GET / HTTP/1.1
  &gt; User-Agent: curl/7.29.0
  &gt; Host: cpanmin.us
  &gt; Accept: */*
  &gt;
  * Connection died, retrying a fresh connect
    0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  * Closing connection 0
  * Issue another request to this URL: 'https://cpanmin.us'
  * About to connect() to cpanmin.us port 443 (#1)
  *   Trying 104.28.29.17...
  * Connected to cpanmin.us (104.28.29.17) port 443 (#1)
  * TLS disabled due to previous handshake failure
  *   CAfile: /etc/pki/tls/certs/ca-bundle.crt
    CApath: none
  * NSS error -12286 (SSL_ERROR_NO_CYPHER_OVERLAP)
  * Cannot communicate securely with peer: no common encryption algorithm(s).
  * Closing connection 1
  curl: (35) Cannot communicate securely with peer: no common encryption algorithm(s).
  </code></pre>