r17610: Added the ability for firefox to drive the winbindd

r17610: Added the ability for firefox to drive the winbindd
ntlm_auth module to allow it to use winbindd cached
credentials.The credentials are currently only stored
in a krb5 MIT environment - we need to add an option to
winbindd to allow passwords to be stored even in an NTLM-only
environment.
Patch from Robert O'Callahan, modified with some fixes
by me.
Jeremy.
(This used to be commit ae7cc298a113d8984557684bd6ad216cbb27cff3)