Closes #283

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

While installing Framadate on Apache, but proxyfied by an Nginx,
$_SERVER['SERVER_PORT'] failed to be correctly handled.

$_SERVER['SERVER_PORT'] is then a string and not an integer, so it was
added in the response of get_server_name() function, breaking all the
css/js links.

I don't know if there is other situations where the bug appears.

Schema of the installation:

Nginx (443) -> Apache2 (80) + Framadate

Please note that using port 80 on Nginx worked.

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

Some fixes on comments

Fix #205 

See merge request !161

Correcting comment typo in file header

Fix #190 

See merge request !144

    - Ajout d'un editeur de markdown
    - On garde le formattage des espaces
    - On empeche l'utilisateur de mettre du html

This line changes all URLs to https URLs if the Framadate installation
is behind a reverse proxy, and the reverse proxy adds the
X-Forwarded-Proto header with the 'https' value. Configuration for
nginx:

proxy_set_header X-Forwarded-Proto https;

This setup is currently used by the Framadate installation of
Bits of Freedom (https://kies.bof.nl).

	- Also added Framadate\Message à link attribute
	- Added local anchor #edit with vote edition
	- For now, when the poll owner check the new edit option (ie: "Votes are editable solely by their owner"), users get their update link on vote creation

	- Changed the smarty modifier poll_url to a function and added the vote_id parameter
	- Modified accordingly all poll_url occurence in templates
	- Added htaccess.txt to be sure to keep poll's URL changes up to date
	- Escaped some templates output in order to avoid to broke HTML
	- Using vote's uniqId instead of vote's id when it's needed

* Do str_replace only on the $dirname variable

(cherry picked from commit 6751a8a9)

Conflicts:
	adminstuds.php
	app/classes/Framadate/Utils.php
	creation_sondage.php

(cherry picked from commit e6d171a4)

Conflicts:
	app/classes/Framadate/Utils.php

Cherry-picked :
        e6d171a4

Conflicts:
	app/classes/Framadate/Utils.php