Constant libp2p::rendezvous::MAX_TTL

pub const MAX_TTL: u64 = _; // 259_200u64

Available on crate feature rendezvous only.

By default, nodes should allow a maximum TTL of 72h

https://github.com/libp2p/specs/tree/master/rendezvous#recommendations-for-rendezvous-points-configurations.