QUIC: improved path validation. Previously, path was considered valid during arbitrary selected 10m timeout since validation. This is quite not what RFC 9000 says; the relevant part is: An endpoint MAY skip validation of a peer address if that address has been seen recently. The patch considers a path to be 'recently seen' if packets were received during idle timeout. If a packet is received from the path that was seen not so recently, such path is considered new, and anti-amplification restrictions apply.

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  1
#endif

END