[Pkg-matrix-maintainers] Bug#923586: matrix-synapse: hard to troubleshoot server's name left blank

[sergio]

Package: matrix-synapse
Version: 0.99.0-1~bpo9+3
Severity: normal

It's extremely hard to understand what's wrong if the "Name of the
server" was accidentally left blank during the installation process.
Daemon just won't start. Not output will be produced. Moreover the exit
status will be 0! The log file is absent.

# service matrix-synapse start && echo OK
OK
# /etc/init.d/matrix-synapse start && echo OK
OK
# invoke-rc.d matrix-synapse start && echo OK
OK


The only way to understand what's wrong is to run it directly:

# python3 -m "synapse.app.homeserver" --config-path /etc/matrix-synapse/homeserver.yaml

Missing mandatory `server_name` config option.