Fix rsync backup options string: extraneous single quotes causing problems (#1629)
Fix rsync backup options string: extraneous single quotes causing problems (#1629)

The resulting command had nested single quotes which doesn't work

I think this fixes all/most of the issues in #1627.  I am getting a full backup, then the next time it's run I get an incremental.  running from the CLI with --status looks good, --verify looks good, and --list looks good.
mail-in-a-box/mailinabox,mail-in-a-box/mailinabox,mail-in-a-box/mailinabox,mail-in-a-box/mailinabox