David Roberts 43665183c2 [ML] Restrict detection of epoch timestamps in find_file_structure (#43188)
Previously 10 digit numbers were considered candidates to be
timestamps recorded as seconds since the epoch and 13 digit
numbers as timestamps recorded as milliseconds since the epoch.

However, this meant that we could detect these formats for
numbers that would represent times far in the future.  As an
example ISBN numbers starting with 9 were detected as milliseconds
since the epoch since they had 13 digits.

This change tweaks the logic for detecting such timestamps to
require that they begin with 1 or 2.  This means that numbers
that would represent times beyond about 2065 are no longer
detected as epoch timestamps.  (We can add 3 to the definition
as we get closer to the cutoff date.)
2019-06-13 13:15:41 +01:00
..
2019-06-07 08:39:27 -04:00

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