Breaks with the following challenge:
realm="localhost",nonce="764d66b5e8c907eb5873d5d4c2131
1a1ad62535c",qop=auth,charset=utf-8,algorithm=md5-sess'''
'realm="localhost",nonce="764d66b5e8c907eb5873d5d4c213
11a1ad62535c",qop=auth,charset=utf-8,algorithm=md5-sess

Suggest changing the implementation to:

import csv
def parse_http_list(s):
    """Parse lists as described by RFC 2068 Section 2.

    In particular, parse comman-separated lists where the 
elements of
    the list may include quoted-strings.  A quoted-string could
    contain a comma.
    """
    return csv.reader([s]).next()

Logged In: YES 
user_id=46639

I appear to be cut & paste challenged. The challenge is:

realm="localhost",nonce="764d66b5e8c907eb5873d5d4c2131
1a1ad62535c",qop=auth,charset=utf-8,algorithm=md5-sess

Might not be worth fixing on the 2.3 branch, since this isn't actually 
generated from a webserver (its from jabberd).

Logged In: YES 
user_id=261020

This should be closed.  Patch 901480 is better.

(Stuart: I don't think it's wise to handle this
RFC-documented protocol using a module designed for reading
CSV files.  Also, in future, please always use the file
upload feature of the tracker to upload any code or patch,
rather than pasting into the text area.  Thanks for the report!)

Logged In: YES 
user_id=1188172

I agree with jjlee. Depending on csv is unnecessary.