SetModTime kept the caller's full precision modtime in memory while
the server stores 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
5d4c2c32a0