SetModTime (which Put and Update also use) kept the caller's full
precision modtime in memory while Chtimes sets it with second
precision, so until the object was re-read the modtime did not match
what a fresh listing would report. This broke wrappers which compare
exact modtimes, such as the hasher backend's fingerprint and the VFS
cache. Truncate the modtime to second precision to match what the
server stores.
Nick Craig-Wood
0a39aa4d32