[HttpFoundation] add support for X_FORWARDED_PREFIX header

[fabpot]

Q	A
Feature PR	symfony/symfony#37734
PR author(s)	@jeff1985
Merged in	5.2-dev

[carsonbot]

Thank you for this issue.
There has not been a lot of activity here for a while. Has this been resolved?

[carsonbot]

Friendly ping? Should this still be open? I will close if I don't hear anything.

[carsonbot]

Hey,

I didn't hear anything so I'm going to close it. Feel free to comment if this is still relevant, I can always reopen!

[JohJohan]

See #15910