Add PROXY protocol support to Caddy

Syntax

proxyprotocol *cidr* ... {
    timeout *val*
}

• cidr CIDR ranges to process PROXY headers from
• val duration value (e.g. 5s, 1m)

The default timeout is 5s. Set to 0 or none to disable the timeout.

Examples

# Enable from any source 
proxyprotocol

# Enable from local subnet and fixed IP
proxyprotocol 10.22.0.0/16 10.23.0.1/32

# Set header timeout
proxyprotocol 10.22.0.0/16 10.23.0.1/32 {
    timeout 5s
}