  http://123.123.123
  http://3628126748
  http://123
  http://.www.foo.bar/
  http://.www.foo.bar./
  http://[::1:2::3]:8080/
  http://[]
  http://[]:8080
  http://example..com/
 
</s>
http://000.000.000.000
http://016.016.016.016
http://192.168.000.001
http://01.2.3.4
http://01.2.3.4
http://1.02.3.4
http://1.2.03.4
http://1.2.3.04
  http://123.123.123
  http://3628126748
  http://123
http://000.000.000.000
http://016.016.016.016
http://192.168.000.001
http://01.2.3.4
http://01.2.3.4
http://1.02.3.4
http://1.2.03.4
http://1.2.3.04
  http://.www.foo.bar/
  http://.www.foo.bar./
  http://[::1:2::3]:8080/
  http://[]
  http://[]:8080
  http://example..com/
keep keep add keep keep keep keep keep keep
 Fixed CVE-2021-33571 -- Prevented leading zeros in IPv4 addresses.

validate_ipv4_address() was affected only on Python < 3.9.5, see [1].
URLValidator() uses a regular expressions and it was affected on all
Python versions.

[1] https://bugs.python.org/issue36384
tests/validators/invalid_urls.txt