Constant `DETERMINISTIC_TIMESTAMP`

pub const DETERMINISTIC_TIMESTAMP: u64 = 1_153_704_088u64;

A deterministic, arbitrary, non-zero timestamp that use used as mtime of headers when HeaderMode::Deterministic is used.

This value, chosen after careful deliberation, corresponds to Jul 23, 2006, which is the date of the first commit for what would become Rust.