maxlistusers property (managed from user folder properties tab) which
limits the number of roles that rolemanager's get_valid_users will return
before raising an OverflowError.  The DTML for listLocalRoles will insert a
text box for user id entry if OverflowError is raised.

discovered for a media client.  DTMLValidate is just validate with
different arguments -- this eliminates an argument remapping step.

_request(): Avoid recompiling the regular expression on every call.

output to (needed to catch output for
AccessControl/securitySuite/testSecurity.py).

-minor code cleanup

        Steve Alexander)

fixed typo

following whitespace ignored.

escaping logic.

DTML stuff is now roughly 8-10% faster.

makes Dreamweaver happier.

[Synchronizing the HTMLParser module with the Python standard library.]

Re-factor the HTMLParser class to use the new markupbase.ParserBase class.
Use a new internal method, error(), consistently to raise parse errors;
the new base class also uses this.