#26 Patch to allow domain for cookie

[Anonymous]

This patch intended for cookie based authentication.
It adds "cookie_domain" property for exUserFolder. This
property determines domain for all setCookie /
expireCookie operation in exUserFolder. The main goal
is to make single authentication for many subdomains
in one domain. For example, we have a domains
a.domain.com, b.domain.com, c.domain.com etc served by
single exUserFolder and want user logged in
a.domain.com became logged in other sites. In this case
we can fill cookie_domain property with ".domain.com"

[Nobody/Anonymous]

Patched exUserFolder and diff with exUserFolder 0.50.1

[Yury]

Logged In: YES
user_id=1237091

Forgot to mention - patch was tested with Konqueror,
Mozilla-Firefox (Linux, Windows) and IE6 (with empty and
non-empty cookie domains)