title: http.sslVerify=false doesn't disable ssl verification in git config
body: <h1>Issue:</h1>
  <p>I have been trying to clone a git repository from a Ubuntu AWS instance, through an http proxy (set in git global config) from an enterprise GitHub server.</p>
  <p>Cloning from the proxy works, but cloning from the instance (through the proxy) I get the following error:</p>
  <blockquote>
  <p>fatal: unable to access 'https://githubserver.company.com/repository.git/': server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none</p>
  </blockquote>
  <p>I have already tried to download the server certificate, add it to my trusted certificates and specify the <strong>http.sslCAInfo</strong> or <strong>http.sslCAPath</strong> options in the git config as specified in many, many other threads.</p>
  <p><strong>Apparently, everyone else who had this issue was able to at least debug the issue or make a one-time exception to security rules by temporarily disabling ssl verification in the git configuration.
  Yet using <code>git config --global http.sslVerify false</code> or any variation (as a command flag, environment variable, at a local, global or system level, etc.) has no effect.</strong></p>
  <p>This has happened to people with unsynchronized dates/times (but the time in the AWS instance and the proxy are both synchronized through the same ntp server), or in a specific context on Windows, but I cannot find any other instance of this git configuration being ignored like this on a Linux machine.</p>
  <p>I am aware that this would have major security implications but not being able to find people with a similar problem makes me think that I must have missed something.</p>
  <p>I have gone through dozens and dozens of similar threads and I wasn't able to find a single person with my same issue.</p>
  <h1>What I tried:</h1>
  <p>I got the certificate through:</p>
  <p><code>openssl s_client -showcerts -connect $hostname:$port -servername $hostname</code></p>
  <p>placed it in</p>
  <p><code>/usr/local/share/ca-certificates/</code> as a .pem file</p>
  <p>added the certificate to <strong>/etc/ssl/certs/ca-certificates.crt</strong> through</p>
  <p><code>sudo update-ca-certificates</code>.</p>
  <p>and added the following options in the git global config:</p>
  <pre><code>sslCAInfo = /etc/ssl/certs/ca-certificats.crt
  sslCAPath = /etc/ssl/certs/
  </code></pre>
  <p>Before trying:</p>
  <p><code>git config --global http.sslVerify false</code></p>