The worker bumps it only when a header is RENAMED or REMOVED, never when one is added, so a
higher number is the only signal that a field read by name here may have moved. Without it a
renamed header is indistinguishable from a header the response did not set.
The
x-cfw-vcontract version this build reads.The worker bumps it only when a header is RENAMED or REMOVED, never when one is added, so a higher number is the only signal that a field read by name here may have moved. Without it a renamed header is indistinguishable from a header the response did not set.