Constant libp2p::rendezvous::MIN_TTL

pub const MIN_TTL: u64 = _; // 7_200u64

Available on crate feature rendezvous only.

By default, nodes should require a minimum TTL of 2h

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