fields: replace IPy dependency with ipaddress module

Resolves archlinux#229

mirrors/fields.py

@@ -1,10 +1,9 @@
-from IPy import IP
-
 from django import forms
 from django.core import validators
 from django.core.exceptions import ValidationError
 from django.db import models
 
+from ipaddress import ip_address as IP
 
 class IPNetworkFormField(forms.Field):
     def to_python(self, value):

mirrors/tests/test_mirrorrsync.py

@@ -27,4 +27,4 @@ def test_ipv4(self):
     def test_invalid(self):
         with self.assertRaises(ValueError) as e:
             MirrorRsync.objects.create(ip="8.8.8.8.8", mirror=self.mirror)
-        self.assertIn('IPv4 Address with more than 4 bytes', str(e.exception))
+        self.assertIn('does not appear to be an IPv4 or IPv6 address', str(e.exception))

requirements.txt

@@ -1,6 +1,5 @@
 -e git+git://github.com/fredj/cssmin.git@master#egg=cssmin
 Django==3.0.9
-IPy==1.00
 Markdown==3.2.1
 bencode.py==2.0.0
 django-countries==5.5