Travis placed an unnecessary breaking restriction on our tests and failed to respond within 72 hours to our complaint. This has forced us to introduce Github Actions to manage our testing. This is hopefully a temporary measure while Travis either gets itself together or we find a non-Github requirement.
Previously Etherpad would not pass the correct client IP address through and this caused the rate limiter to limit users behind reverse proxies. This change allows Etherpad to use a client IP passed from a reverse proxy.
Note to devs: This header can be spoofed and spoofing the header could be used in an attack. To mitigate additional *steps should be taken by Etherpad site admins IE doing rate limiting at proxy.* This only really applies to large scale deployments but it's worth noting.