[Pkg-mailman-hackers] Bug#930133: Postinst tries to invoke systemctl on non-systemd systems

[Jonas Meurer]

Package: mailman3-web
Version: 0+20180916-7
Severity: serious

Hello,

the mailman3-web postinst runs 'systemctl daemon-reload' during
upgrades, regardless of whether systemd is installed on the system or
not. This breaks installation of mailman3-web on systems with sysvinit.

Cheers
 jonas