title: custom date/time format for --out-format in rsync
body: <p>According to the <a href="https://linux.die.net/man/5/rsyncd.conf" rel="nofollow noreferrer">man</a> pages, <code>%t</code> is used to output the current date and time with <code>--out-format</code>. Is there anyway to specify the format to use for the date/time?</p>
  
  <pre><code>$ rsync --out-format="%t" "/source" "/destination"
  2019/01/19 23:12:57 | home/nacho/backup_test/source 1
  2019/01/19 23:12:57 | home/nacho/backup_test/source 1/001
  2019/01/19 23:12:57 | home/nacho/backup_test/source 1/002
  2019/01/19 23:12:57 | home/nacho/backup_test/source 1/003
  2019/01/19 23:12:57 | home/nacho/backup_test/source 1/100
  2019/01/19 23:12:57 | home/nacho/backup_test/source 1/file 100
  2019/01/19 23:12:57 | home/nacho/backup_test/source 1/folder
  2019/01/19 23:12:57 | home/nacho/backup_test/source 1/folder/004
  2019/01/19 23:12:57 | home/nacho/backup_test/source 2
  2019/01/19 23:12:57 | home/nacho/backup_test/source 2/006
  </code></pre>