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
question = post.parent_id if post.parent_id else post
        if kwargs.get('comment') and post.forum_id.id == forum.id:
            
            post.with_context(mail_create_nosubscribe=True).message_post(
                body=kwargs.get('comment'),
                message_type='comment',
                subtype='mt_comment')
        return werkzeug.utils.redirect("/forum/%s/question/%s" % (slug(forum), slug(question)))
    @http.route('/forum/<model("forum.forum"):forum>/post/<model("forum.post"):post>/toggle_correct', type='json', auth="public", website=True)
    def post_toggle_correct(self, forum, post, **kwargs):
        if post.parent_id is False:
            return request.redirect('/')
        if not request.session.uid:
            return {'error': 'anonymous_user'}
        
        (post.parent_id.child_ids - post).write(dict(is_correct=False))
        post.is_correct = not post.is_correct
        return post.is_correct
    @http.route('/forum/<model("forum.forum"):forum>/post/<model("forum.post"):post>/delete', type='http', auth="user", methods=['POST'], website=True)
    def post_delete(self, forum, post, **kwargs):