Snapcast: snapserver "unknown configuration option" messages in log

[jonahquark81]

When I start snapserver I get 'unknown configuration' messages:

Jun 6 10:11:53 multimedia snapserver[46496]: unknown configuration option: logging.filter
Jun 6 10:11:53 multimedia snapserver[46496]: unknown configuration option: -d
Jun 6 10:11:53 multimedia snapserver[46496]: unknown configuration option: -c
Jun 6 10:11:53 multimedia snapserver[46496]: Settings file: "/var/lib/snapserver/server.json"
Jun 6 10:11:53 multimedia snapserver[46496]: daemonizing
Jun 6 10:11:53 multimedia snapserver[46497]: daemon started

I'm running on FreeBSD within an IOCage jail. Despite the messages the options are being used - it is daemonizing and the config file is being read, although I'm not convinced the logging.filter is working as I've tried setting to debug and don't see any difference in the log.

FreeBSD rc options:
# grep snap /etc/rc.conf
snapserver_enable="YES"
snapserver_opts="-d -c /usr/local/etc/snapserver.conf"

Logging section from /usr/local/etc/snapserver.conf

`# Logging options

#######################################################`

#
[logging]
#sink = system
filter = *:debug
#
###############################################################################

[badaix]

this is fixed in develop branch fce34d82c8896683620b3f1ef9e47a7a62971102