Impacted versions:
Latest Odoo Forum

Steps to reproduce:
Get a nofitication from the Odoo forum (by subscription or by a comment to your posting)

Current behavior:
The notification email contain the subject: "Re: False" and contains no link to the forum post.
Expected behavior:
The notification email contains the title of the forum post and a link to the forum post.
Video/Screenshot link (optional):

![selection_195](https://cloud.githubusercontent.com/assets/1814941/15383579/60b554b0-1d94-11e6-8b1b-875a11e3d82b.png)

addons/website_forum/controllers/main.py
values = {
            'name': kwargs.get('name'),
            'website': kwargs.get('website'),
            'email': kwargs.get('email'),
            'city': kwargs.get('city'),
            'country_id': int(kwargs.get('country')) if kwargs.get('country') else False,
            'website_description': kwargs.get('description'),
        }
        if request.uid == user.id:  
            values['website_published'] = kwargs.get('website_published') == 'True'
        user.write(values)
        return werkzeug.utils.redirect("/forum/%s/user/%d" % (slug(forum), user.id))
    
    
    @http.route('/forum/<model("forum.forum"):forum>/badge', type='http', auth="public", website=True)
    def badges(self, forum, **searches):
        Badge = request.env['gamification.badge']
        badges = Badge.sudo().search([('challenge_ids.category', '=', 'forum')])
        badges = sorted(badges, key=lambda b: b.stat_count_distinct, reverse=True)
        values = self._prepare_forum_values(forum=forum, searches={'badges': True})
        values.update({
            'badges': badges,
        })
        return request.website.render("website_forum.badge", values)
    @http.route(['''/forum/<model("forum.forum"):forum>/badge/<model("gamification.badge"):badge>'''], type='http', auth="public", website=True)
    def badge_users(self, forum, badge, **kwargs):