fix for digest auth when using keepalive.py
The problem was with python > 2.3 which stores part of the
headers in unredirected_hdrs.
Furthermore, we simplify the code to use httplib directly.
fix issue473
changeset: 0:9c2cf2b35aa7
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: add foo
changeset: 1:3756a9556b89
tag: tip
user: test
date: Mon Jan 12 13:46:41 1970 +0000
summary: change foo
2 revisions:
9c2cf2b35aa7
3756a9556b89