add versioned build dependency on debhelper 5. version 4 would work, but the recommended practice is to always declare an explicit versioned dependency on debhelper equal to or greater than the compatibility level used by the package. We are using compat level 5

virtual-package-depends-without-real-package-depends can be resolved by adding a depends on bsd-mailx which is the real package that mailx transition depends on

to improve the ninjahelper interface as requested by alster in redmine

something to the changelog all for 98e62c95

Conflicts:
	AUTHORS
	ChangeLog
	handlers/maildir.in
	handlers/mysql.in
	handlers/rsync.in
	handlers/sys.helper.in
	handlers/sys.in
	src/backupninja.in

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.

This also fixes Redmine bug #1021.

This should fix Redmine bug #1340.

This option makes pipelines return as status the value of the last (rightmost)
command to exit with a non-zero status, or zero if all commands exit
successfully. See bash(1) for details.

E.g. this prevents the following from exiting with status 0 (!) if pg_dumpall
fails:

        pg_dumpall | gzip

reportspace: skip non-directories and places that don't exist on the local filesystem (Closes: #536049)

Cherry-picked and re-indented patch 76792c8f45afa1fdaeb81c2af77499ca0b83ce64
from Olivier Berger.

Conflicts:

	src/backupninja.in

This commit (64edfccf) was wrongly committed to
the debian branch.

Conflicts:

	handlers/mysql.in

... hoping it will help supporting *BSD some day.

... to support shell meta-characters in database names.
Closes Redmine bug #617.