old_contents: import sys
  import socket
  import errno
  
  logprefix = ''
  verbose = 0
  
  
  def log(s):
      try:
          sys.stdout.flush()
          sys.stderr.write(logprefix + s)
          sys.stderr.flush()
      except IOError:
          # this could happen if stderr gets forcibly disconnected, eg. because
          # our tty closes.  That sucks, but it's no reason to abort the program.
          pass
  
  
  def debug1(s):
      if verbose >= 1:
          log(s)
  
  
  def debug2(s):
      if verbose >= 2:
          log(s)
  
  
  def debug3(s):
      if verbose >= 3:
          log(s)
  
  
  class Fatal(Exception):
      pass
  
  
  def list_contains_any(l, sub):
      for i in sub:
          if i in l:
              return True
      return False
  
  
  def resolvconf_nameservers():
      l = []
      for line in open('/etc/resolv.conf'):
          words = line.lower().split()
          if len(words) >= 2 and words[0] == 'nameserver':
              l.append(family_ip_tuple(words[1]))
      return l
  
  
  def resolvconf_random_nameserver():
      l = resolvconf_nameservers()
      if l:
          if len(l) > 1:
              # don't import this unless we really need it
              import random
              random.shuffle(l)
          return l[0]
      else:
          return (socket.AF_INET, '127.0.0.1')
  
  
  def islocal(ip, family):
      sock = socket.socket(family)
      try:
          try:
              sock.bind((ip, 0))
          except socket.error as e:
              if e.args[0] == errno.EADDRNOTAVAIL:
                  return False  # not a local IP
              else:
                  raise
      finally:
          sock.close()
      return True  # it's a local IP, or there would have been an error
  
  
  def family_ip_tuple(ip):
      if ':' in ip:
          return (socket.AF_INET6, ip)
      else:
          return (socket.AF_INET, ip)
  
  
  def family_to_string(family):
      if family == socket.AF_INET6:
          return "AF_INET6"
      elif family == socket.AF_INET:
          return "AF_INET"
      else:
          return str(family)
  
new_contents: import sys
  import socket
  import errno
  
  logprefix = ''
  verbose = 0
  
  
  def log(s):
      try:
          sys.stdout.flush()
          sys.stderr.write(logprefix + s)
          sys.stderr.flush()
      except IOError:
          # this could happen if stderr gets forcibly disconnected, eg. because
          # our tty closes.  That sucks, but it's no reason to abort the program.
          pass
  
  
  def debug1(s):
      if verbose >= 1:
          log(s)
  
  
  def debug2(s):
      if verbose >= 2:
          log(s)
  
  
  def debug3(s):
      if verbose >= 3:
          log(s)
  
  
  class Fatal(Exception):
      pass
  
  
  def resolvconf_nameservers():
      l = []
      for line in open('/etc/resolv.conf'):
          words = line.lower().split()
          if len(words) >= 2 and words[0] == 'nameserver':
              l.append(family_ip_tuple(words[1]))
      return l
  
  
  def resolvconf_random_nameserver():
      l = resolvconf_nameservers()
      if l:
          if len(l) > 1:
              # don't import this unless we really need it
              import random
              random.shuffle(l)
          return l[0]
      else:
          return (socket.AF_INET, '127.0.0.1')
  
  
  def islocal(ip, family):
      sock = socket.socket(family)
      try:
          try:
              sock.bind((ip, 0))
          except socket.error as e:
              if e.args[0] == errno.EADDRNOTAVAIL:
                  return False  # not a local IP
              else:
                  raise
      finally:
          sock.close()
      return True  # it's a local IP, or there would have been an error
  
  
  def family_ip_tuple(ip):
      if ':' in ip:
          return (socket.AF_INET6, ip)
      else:
          return (socket.AF_INET, ip)
  
  
  def family_to_string(family):
      if family == socket.AF_INET6:
          return "AF_INET6"
      elif family == socket.AF_INET:
          return "AF_INET"
      else:
          return str(family)
  
subject: Remove unused function.