Add mising parameter

[martinqt]

This has been merged in the symfony docs repo: symfony/symfony-docs#1816

[gregquat]

I'll merge it once merged in sf-docs repo (https://github.com/symfony/symfony-docs/blob/master/cookbook/testing/http_authentication.rst)

[martinqt]

Seems that they only merged it for 2.0 so far. I asked them.

[skeud]

We didn't create 2.0 branch for FR translation as it would have been too much work at the point we managed to be in sync with the master of the EN version.

Hence if it is only in 2.0, you can:

• close this PR
• go for creating the 2.0 branch (but as @fabpot mentioned at some point, I think it is not worth the effort and better to focus on the future branches sync) and push your PR to this 2.0 branch

Choice is up to you but I would really advice the 1st proposal ;-)

Best and thanks a lot for the help so far - really appreciated!!!

[martinqt]

So if i'm correct this will be done during the future big sync if they merged it.
Well, option 1 also sounds really good to me :)