title: Problem with mysqldump: "--defaults-extra-file" option is not working as expected
body: <p>I run the following command from the Windows command line to backup my database:</p>
  
  <pre><code>...\right_path\mysqldump --add-drop-database --databases my_database_name
                           --defaults-extra-file=d:\1.cnf
  </code></pre>
  
  <p>where <code>d:\1.cnf</code> contains the following:</p>
  
  <pre><code>[client]
  user="my_user"
  password="my_password"
  </code></pre>
  
  <p>Unfortunately, I got the following error message:</p>
  
  <pre><code>mysqldump: unknown variable 'defaults-extra-file=d:\1.cnf'
  </code></pre>
  
  <p>If I do:</p>
  
  <pre><code>...\right_path\mysqldump --add-drop-database --databases my_database_name
                           --user="my_user" --password="my_password"
  </code></pre>
  
  <p>it works as expected.</p>
  
  <p>What am I doing wrong ?</p>