Feature Request: Allow request header modifying / appending via configuration

[yue9944882]

Do you want to request a feature or report a bug?

feature request

What did you do?

I want add/set HTTP Headers for all in coming HTTP request to explicitly force them using HTTP keep-alived connection. But I actually didn't find any documentation about it or traefik doesn't support it currently.

What did you expect to see?

Simply add some configuration entries to make it happen.

What did you see instead?

Output of traefik version: (What version of Traefik are you using?)

v1.4.2

[yue9944882]

Or rather, I'm expecting implementations of this annotation

[ldez]

This come in 1.5, see #2460.

You can try the 15.0-rc1.