BFO2LSDF [FIX]: output only IPv4 address
BFO2LSDF uses /bin/ip to check for an active VPN tunnel. It reports the IP address to the system logger. /bin/ip reports the IPv4 and the IPv6 address, which produced a line break in the output of the previous version of BFO2LSDF, which in turn confused the log-file parser in csbackntfy. The current version only outputs the IPv4 address.