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

* Use Smarty to split View and Controller on studs page (work in progress)
* Add field "active" to Poll
* And some other stuff...

* Utils::issetAndNoEmpty is now removed
* Use Form object to store value from page to page

* Rename fields in Sondage table
* Add field "editable" which tells when users can edit their votes
* PDO : Configure 2 options (FETCH_OBJ + ERRMODE_EX)
* "formatsondage" does contains "+" (or not) anymore

* Store all informations about forms into an object "Form" stored in $_SESSION['form']
* Replace connection to database by PDO object
* Check if database is ready in bandeaux.php file