Issue #20939: Backout test_urllib2.test_issue16464 disables:
    68335b8afb1f 3.4
    ad0c75b7bd7d default
Issue #20939: Use www.example.com instead of www.python.org to avoid test
failures when ssl is not present.
Issue #20939: merge from 3.4
Issue #20939: remove stray character from comment
Issue #20939: merge from 3.4
Issue #21069: Temporarily use www.google.com while investigating
test_urllibnet.test_fileno intermittent failures with www.example.com.
Issue 21069: merge from 3.4