title: git-ftp fatal: Remote host not set
body: <p>I'm getting this error after pipeline runs:</p>
  
  <pre><code>Preparing to unpack .../git-ftp_1.3.1-1_all.deb ...
  Unpacking git-ftp (1.3.1-1) ...
  Setting up libcurl3:amd64 (7.52.1-5+deb9u6) ...
  Processing triggers for libc-bin (2.24-11+deb9u3) ...
  Setting up curl (7.52.1-5+deb9u6) ...
  Setting up git-ftp (1.3.1-1) ...
  $ git ftp push --user $FTP_USERNAME --passwd $FTP_PASSWORD sftp://$FTP_HOST
  fatal: Remote host not set.
  ERROR: Job failed: exit code 1
  </code></pre>
  
  <p>This is my .yml config:</p>
  
  <pre><code>image: samueldebruyn/debian-git
  
  stage_deploy:
    only:
      - develop
    script:
      - apt-get update
      - apt-get -qq install git-ftp
      - git ftp push --user $FTP_USERNAME --passwd $FTP_PASSWORD sftp://$FTP_HOST
  </code></pre>
  
  <p>A month ago it worked fine. The values of the variables are correct.. </p>
  
  <p>Any ideas?</p>