> 1. Deprecates the "X-" convention for newly defined parameters (emphasis mine)
> 4. Makes no recommendation as to whether existing "X-" parameters ought to remain in use or be migrated to a format without the "X-"; this is a matter for the creators or maintainers of those parameters.
In practice, I expect X-Forwarded-For to live long and prosper for many years even if a X-less version standardizes.
> 1. Deprecates the "X-" convention for newly defined parameters (emphasis mine)
> 4. Makes no recommendation as to whether existing "X-" parameters ought to remain in use or be migrated to a format without the "X-"; this is a matter for the creators or maintainers of those parameters.
In practice, I expect X-Forwarded-For to live long and prosper for many years even if a X-less version standardizes.