fixed detection of secure cookies received over https

BrowserKit's cookie handling only recognises a secure cookie if the
cookie option is set and the cookie was set over an https request.
The client was not passing the url into the cookiejar update code,
causing Cookie::isSecure() to always return false for every cookie.

Fixes symfony/symfony#7666
[HttpFoundation] fixed empty domain= in Cookie::__toString()
[BrowserKit] removed dead code
[HttpFoundation][BrowserKit] fixed path when converting a cookie to a string

An empty path has a different meaning than a /; it means that the path
is the one from the current URI.
merged branch fabpot/cookie (PR #7738)

This PR was merged into the 2.1 branch.

Discussion
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[BrowserKit] fixed detection of secure cookies received over https

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7666, #7738
| License       | MIT
| Doc PR        | N/A

As reported in symfony/symfony#7666, BrowserKit's cookie handling only recognises a secure cookie if the cookie option is set and the cookie was set over an https request. The client was not passing the url into the cookiejar update code, causing Cookie::isSecure() to always return false for every cookie.

I have corrected this behaviour and added an additional unit test to prove the bug and fix.

Commits
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36d057b [HttpFoundation][BrowserKit] fixed path when converting a cookie to a string
c884151 [BrowserKit] removed dead code
495d0e3 [HttpFoundation] fixed empty domain= in Cookie::__toString()
c2bc707 fixed detection of secure cookies received over https
Filesystem::touch() not working with different owners (utime/atime issue)
merged branch fabpot/moved_filesystem_3 (PR #7752)

This PR was submitted for the master branch but it was merged into the 2.1 branch instead (closes #7752).

Discussion
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Filesystem::touch() not working with different owners (utime/atime issue)

This PR was submitted on the symfony/Filesystem read-only repository and moved automatically to the main Symfony repository (closes symfony/Filesystem#3).

Case: I have 2 users, www-data and myself. I have a command script that makes a lock file in /var/lock/.../ something. This command is called from a post request by FOS and ran in the background.  Whever one of the 2 methods (web/cli manually) is used, the other user won't have permissions to use the Filesystem::touch(). The reason this won't work is the second parameter.

What touch() does:
$touch param: The touch time. If time is not supplied, the current system time is used.
$atime param: If present, the access time of the given filename is set to the value of atime. Otherwise, it is set to the value passed to the time parameter. If neither are present, the current system time is used.

So the current code is basically copying this. However, if the second parameter is null it is still present and will cause the same problem. Note that all files and folders related are set to 0777 and have the owner of www-data. I'm accessing them under my own account here:

Interactive shell

php > var_dump(touch('/var/lock/tripolis/ontw/dev/2140191804.lock', null));
PHP Warning:  touch(): Utime failed: Operation not permitted in php shell code on line 1

Warning: touch(): Utime failed: Operation not permitted in php shell code on line 1
bool(false)
php > var_dump(touch('/var/lock/tripolis/ontw/dev/2140191804.lock'));
bool(true)

If I were to pass it without second parameter, let it be time() or null (Filesystem uses time() by default if not present), it DOES work. However, Filesystem::touch() ALWAYS gives a parameter to touch. This parameter is exactly the same value as what the function itself would do in php. Let it be that in my case there is an issue with the atime. I'm not exactly sure how it works but it's not tracked or usable in my case. Because parameter 2 exists, parameter 3 is set. Parameter 3 is not allowed and therefore causes Filesystem::touch() to throw an exception.

Commits
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e3a0fe6 Filesystem::touch() not working with different owners (utime/atime issue)