[web session] fix '#1375582: sometime have to relogin since secure session cookie are used' by having different session cookie for http/https version. Also add application name to avoid potential pb when developping differents appls on the same port.

if not rql('CWConstraintType X WHERE X name "RQLUniqueConstraint"',
           ask_confirm=False):
    rql('INSERT CWConstraintType X: X name "RQLUniqueConstraint"',
        ask_confirm=False)