TODO:
run other targets even if one target fails due to a error (but fail on bugs...) (base class Exception?)
fix logging exec/scriptname prefix
stats: total/changed files/bytes
config: [target] exclude = ...
0.3.0:
pvl.backup.mount: mount without readonly fails to omit --options arg
XXX: rsync-snapshot clean_interval removes newest items
rsync-wrapper: uses /mnt
better config error when referencing an undefined interval for [target:$:intervals]
0.4.0:
XXX: bad implementation
different run-intervals?
bi-daily intervals?
0.5.0:
config: split pvl-backup.d configs
logging: less config/source-parsing, more 'real rsync command running'