Update reference/configuration/framework.rst

Adding versionadded

Author: humandb

reference/configuration/framework.rst

@@ -148,71 +148,85 @@ session
 cookie_lifetime
 ...............
 
+.. versionadded:: 2.1
+    This option was formerly know as ``lifetime``
+
 **type**: ``integer`` **default**: ``0``
 
 This determines the lifetime of the session - in seconds. By default it will use
 ``0``, which means the cookie is valid for the length of the browser session.
 
-In Symfony 2.1 and before this option was formerly know as ``lifetime``.
-
 cookie_path
 ...........
 
+.. versionadded:: 2.1
+    This option was formerly know as ``path``
+
 **type**: ``string`` **default**: ``/``
 
 This determines the path to set in the session cookie. By default it will use ``/``.
 
-In Symfony 2.1 and before this option was formerly known as ``path``.
-
 cookie_domain
 .............
 
+.. versionadded:: 2.1
+    This option was formerly know as ``domain``
+
 **type**: ``string`` **default**: ````
 
 This determines the domain to set in the session cookie. By default it's blank meaning the
 host name of the server which generated the cookie according to the cookie specification.
 
-In Symfony 2.1 and before this option was formerly known as ``domain``.
-
 cookie_secure
 .............
 
+.. versionadded:: 2.1
+    This option was formerly know as ``secure``
+
 **type**: ``Boolean`` **default**: ``false``
 
 This determines whether cookies should only be sent over secure connections.
 
-In Symfony 2.1 and before this option was formerly known as ``secure``.
-
 cookie_httponly
 ...............
 
+.. versionadded:: 2.1
+    This option was formerly know as ``httponly``
+
 **type**: ``Boolean`` **default**: ``false``
 
 This determines whether cookies should only accesible through the HTTP protocol. This means
 that the cookie won't be accesible by scripting languages, such as Javascript. This setting
 can effectively help to reduce identity theft through XSS attacks.
 
-In Symfony 2.1 and before this option was formerly known as ``httponly``.
-
 gc_probability
 ..............
 
+.. versionadded:: 2.1
+    The ``gc_probability`` option is new in version 2.1
+
 **type**: ``integer`` **default**: ``1``
 
 This defines the probability that the garbage collector (GC) process is started on every session
-initialization. The probability is calculated by using ``gc_probability``_ / ``gc_divisor``_,
+initialization. The probability is calculated by using ``gc_probability`` / ``gc_divisor``,
 e.g. 1/100 means there is a 1% chance that the GC process start on each request.
 
 gc_divisor
 ..........
 
+.. versionadded:: 2.1
+    The ``gc_divisor`` option is new in version 2.1
+
 **type**: ``integer`` **default**: ``1``
 
 See ``gc_probability``_.
 
 gc_maxlifetime
 ..............
 
+.. versionadded:: 2.1
+    The ``gc_maxlifetime`` option is new in version 2.1
+
 **type**: ``integer`` **default**: ``14400``
 
 This determines the number of seconds after whih data will be seen as `garbage` and potentially cleaned up.