[web] kill GMTOFFSET (closes #2154655) Its last user, set_cookie(expires=...), can just as well interpret its argument as UTC. Naïve datetime objects with an implicit non-UTC timezone are just awful.

# -*- coding: utf-8 -*-
# copyright %(year)s %(author)s, all rights reserved.
# contact %(author-web-site)s -- mailto:%(author-email)s
#
%(long-license)s
"""%(distname)s entity's classes"""