Support many php versions (php7) + drop wheezy support

doc/php.md

@@ -1,7 +1,7 @@
 PHP
 ===
 
-- `nginx_php`: boolean if you need to preconfigure PHP (default: false)
+- `nginx_php5` and `nginx_php7`: boolean if you need to preconfigure PHP (default: false)
 - `nginx_php_sockets`: list of sockets (see bellow)
 
 You should see [Nginx upstream module doc](http://nginx.org/en/docs/http/ngx_http_upstream_module.html).
@@ -15,4 +15,4 @@ Each socket have:
 - `max_fails`
 - `fail_timeout`
 
-With default configuration, it works fine with PHP-FPM. But if you install PHP7 with Dotdeb, path changed between version, you must set well this list.
+With default configuration, it works fine with PHP-FPM.

doc/vhost.md

@@ -27,6 +27,7 @@ Common
 - `proto`: (O) list of protocol used. Default is a list with "http". If you need http and https, you must set a list with "http" and "https". You can only set "https" without http support.
 - `ssl_name`: (D) name of the key used when using TLS/SSL. Mandatory when `proto` contains "https"
 - `ssl_template` (O) "strong" (default) or "legacy". You can disable SSL helpers and add your own directives by setting "false". 
+- `php_version` (O) Sepecify PHP version (5 or 7)
 
 (O): Optional
 (M): Mandatory