Filter to set cron limit

[stevegrunwell]

Right now the WP Cron event is always clearing out a maximum of 50 post revisions. On larger sites that produce more than 50 posts a day, the percentage of revisions will never decrease, necessitating manual runs of strike().

Either a filter or setting should be introduced to allow this number to be raised. To mitigate performance concerns of running queries for 1000+ revision IDs at a time, perhaps the strike() method should also be rewritten to chunk IDs.