Back in Time release 1.1.24

Written for Back In Time by Germar on 2017-11-07

Fix a critical bug which allow shell injection

EDIT: This issue has been assigned CVE-2017-16667

Changelog:
* fix critical bug: shell injection in notify-send (https://github.com/bit-team/backintime/issues/834)

Updated on 2017-11-08.