docs: def free_slave(**connection_args):
      '''
      Frees a slave from its master.  This is a WIP, do not use.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' mysql.free_slave
      '''
      slave_db = _connect(**connection_args)
      if slave_db is None:
          return ''
      slave_cur = slave_db.cursor(MySQLdb.cursors.DictCursor)
      slave_cur.execute('show slave status')
      slave_status = slave_cur.fetchone()
      master = {'host': slave_status['Master_Host']}
  
      try:
          # Try to connect to the master and flush logs before promoting to
          # master.  This may fail if the master is no longer available.
          # I am also assuming that the admin password is the same on both
          # servers here, and only overriding the host option in the connect
          # function.
          master_db = _connect(**master)
          if master_db is None:
              return ''
          master_cur = master_db.cursor()
          master_cur.execute('flush logs')
          master_db.close()
      except MySQLdb.OperationalError:
          pass
  
      slave_cur.execute('stop slave')
      slave_cur.execute('reset master')
      slave_cur.execute('change master to MASTER_HOST=''')
      slave_cur.execute('show slave status')
      results = slave_cur.fetchone()
  
      if results is None:
          return 'promoted'
      else:
          return 'failed'