title: General "git-credential-libsecret not found" error
body: <p>The git repo have no LFS enabled, but I was prepared git to use in another clone, so use the <code>git config --global credential.helper</code> that seems the cause of the problem.</p>
  
  <p>Seems <a href="https://stackoverflow.com/q/36585496/287948">the same problem here</a>, but I am using updated <code>git</code> (v2.17.0), so it is not a version problem.</p>
  
  <p>Exemple: after simple <code>git pull</code> the message is</p>
  
  <pre><code>/usr/share/doc/git/contrib/credential/libsecret/git-credential-libsecret get: 1: 
  /usr/share/doc/git/contrib/credential/libsecret/git-credential-libsecret get: 
   /usr/share/doc/git/contrib/credential/libsecret/git-credential-libsecret: 
   not found
  </code></pre>
  
  <hr>
  
  <p>NOTES</p>
  
  <p>There are no <code>git-credential-libsecret</code> file, </p>
  
  <pre><code>sudo ls /usr/share/doc/git/contrib/credential/libsecret/git-credential-libsecret
  ls: cannot access '/usr/share/doc/git/contrib/credential/libsecret/git-credential-libsecret': No such file or directory
  </code></pre>