older versions (lenny) of lvm2 have a bug in vgcfgbackup that makes it so when you specify multiple volume groups to backup, it gives an error, saying you must set the %s template for the name. We are doing that, it just cannot handle it properly.

This change routes around this issue, which has been fixed in later lvm2 releases, by passing only one argument to vgcfgbackup by taking all the volume groups that are found and running them through a for loop

Conflicts:

	ChangeLog

... so that this option can be disabled on systems that don't support it.
This also allows to use another compression program, such as pbzip2 on SMP
machines (closes Roundup bug #2405).

... for rdiff.helper, dup.helper, example.dup and example.rdiff.

... instead of previous /var/backups/duplicity.

This is the only way to securely transmit the FTP password from backupninja
to duplicity.

I'd love to use "dpkg --compare-versions" but we don't want backupninja to be
Debian-specific. Any similar tool?

Signed-off-by: intrigeri <intrigeri@boum.org>

This is necessary to get rid of unnecessary old cache files when cleaning up,
when using duplicity >=0.6.01 that depends on local caching.

Closes: #572721

to improve the ninjahelper interface as requested by alster in redmine

something to the changelog all for 98e62c95

Thanks to maniacmartin <martin@maniacmartin.com> for the patch on which this one
is based.
This closes Redmine bug #1209.

Thanks to stefan <s.freudenberg@jpberlin.de> for the patch.
This fixes Redmine bug #658.