title: wifiphisher traceback. error after entering the number of AP
body: <p>Recently, I used the wifi phisher tool in Kali Linux. when I enter the number of AP in the list, I get the following trace in the terminal:</p>
  
  <pre><code>Traceback (most recent call last):
    File "wifiphisher.py", line 743, in &lt;module&gt;
      dhcp(dhcpconf, ap_iface)
    File "wifiphisher.py", line 407, in dhcp
      Popen(['ifconfig', mon_iface, 'mtu', '1400'], stdout=DN, stderr=DN)
    File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
      errread, errwrite)
    File "/usr/lib/python2.7/subprocess.py", line 1259, in _execute_child
      raise child_exception
  TypeError: execv() arg 2 must contain only strings
  </code></pre>
  
  <p>Any suggestions on this?</p>