dirstate-v2: Separate Rust structs for Timestamp and PackedTimestamp...
dirstate-v2: Separate Rust structs for Timestamp and PackedTimestamp
PackedTimestamp is now exclusively for dirstate-v2 serialization purpose.
It contains unaligned big-endian integers. Timestamp is used everywhere else
and contains native Rust integers.
Differential Revision:
https://phab.mercurial-scm.org/D11632