This change adds:
- a dedicated log file at /var/log/carp.log
- a syslog configuration file in /usr/local/etc/syslog.d/carp.conf to redirect carp-ovh logs to /var/log/carp.log
- a newsyslog configuration file in /etc/newsyslog.conf.d/carp.conf to rotate and compress carp log files
Ref T2292