Feature: extra: Add logrotate configuration file for /var/log/pacemaker.log

The log files are rotated weekly or when they grow bigger than 10M. And we preserve up to 10 of them.  Does it make sense?
Not quite sure. AFAICS, a 10M logfile usually has more than 60,000 lines of messages. I don't actually see any other logrotate config using  a size bigger than 10M in my system ;-)