Bruce cron system (integration with runit)

 This is bcron, a new cron system designed with secure operations in mind.
 To do this, the system is divided into several separate programs, each
 responsible for a separate task, with strictly controlled communications
 between them. The user interface is a drop-in replacement for similar
 systems (such as vixie-cron), but the internals differ greatly.
 .
 This package sets up the bcron services, and replaces the default Debian
 cron package.