sync: filter objects based on size and age

[davies]

rsync support --max-size and --min-size, rclone support --min-age --max-age, they are useful to incremental sync.

       --max-size=SIZE
              This tells rsync to avoid transferring any file that is larger than the specified SIZE.  A  numeric  value  can  be
              suffixed  with  a  string  to  indicate the numeric units or left unqualified to specify bytes.  Feel free to use a
              fractional value along with the units, such as --max-size=1.5m.

              This option is a TRANSFER RULE, so don't expect any exclude side effects.

              The first letter of a units string can be B (bytes), K (kilo), M (mega), G (giga), T (tera), or P (peta).   If  the
              string  is  a single char or has "ib" added to it (e.g. "G" or "GiB") then the units are multiples of 1024.  If you
              use a two-letter suffix that ends with a "B" (e.g. "kb") then you get  units  that  are  multiples  of  1000.   The
              string's letters can be any mix of upper and lower-case that you want to use.

              Finally,  if  the  string  ends with either "+1" or "-1", it is offset by one byte in the indicated direction.  The
              largest possible value is usually 8192P-1.

              Examples: --max-size=1.5mb-1 is 1499999 bytes, and --max-size=2g+1 is 2147483649 bytes.

              Note that rsync versions prior to 3.1.0 did not allow --max-size=0.

       --min-size=SIZE
              This tells rsync to avoid transferring any file that is smaller than the specified SIZE,  which  can  help  in  not
              transferring small, junk files.  See the --max-size option for a description of SIZE and other info.

              Note that rsync versions prior to 3.1.0 did not allow --min-size=0.

[hannahkamundson]

I would like to take this ticket @davies

[zhoucheng361]

fixed by: #4912