The new address is "rhttp@".
This is used to intercept the connection after proper HTTP/2 establishment.
The connection is reversed to the backend side and inserted into the idle
- pool of <srv> server. This is useful for reverse server with '@reverse'
+ pool of <srv> server. This may only be used with servers having an 'rhttp@'
address.
An extra parameter <expr> can be specified. Its value is interpreted as a