Now there is at least one environment variable that controls
synapse server's behaviour: SYNAPSE_CACHE_FACTOR.
So, it makes sense to make systemd unit file to use
environment configuration file that can set this variable's value.
Signed-off-by: Oleg Girko <ol@infoserver.lv>
The added logger configuration (--log-config or log_config:) uses
systemd's python bindings to pass messages directly to the journal.
Signed-off-by: Ivan Shapovalov <intelfx100@gmail.com>