[HttpFoundation] Request::splitHttpAcceptHeader incorrect result order

[kerihenare]

splitHttpAcceptHeader ignores the order of Accept items. It correctly sorts by q-value but loses the given order for items with the same q-value. While the spec doesn't explicitly state that order should be considered for items with the same q-value, it is implied.

This issue exists in all versions of Symfony (including 1.x & 2.x). The related tests seem to be written to match the result rather than the other way around (No offence intended).

Here's my test: https://gist.github.com/3791883