[PATCH 3 of 8] tests: make test-url use absolute_import

[timeless]

Pulkit Goyal wrote:
> -from mercurial.sslutil import _verifycert
> +from mercurial import (
> +    sslutil,
> +)
>
>  # Test non-wildcard certificates
> -check(_verifycert(cert('example.com'), 'example.com'),
> +check(sslutil._verifycert(cert('example.com'), 'example.com'),

instead of changing all the check lines, add this after the from ...
import (...) block:
_verifycert = sslutil._verifycert