[BrowserKit] added ability to ignored malformed set-cookie header
merged branch jfsimon/issue-7039 (PR #7347)

This PR was merged into the 2.1 branch.

Commits
-------

fc47589 [BrowserKit] added ability to ignored malformed set-cookie header

Discussion
----------

[BrowserKit] adds ability to ignore malformed set-cookie header

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7039