Use iRules to query number of active connections against a node

The idea of a perpetual script is to, on some regular and frequent basis, query for the DNS records of a given site, and then update a pool. That pool would have a regular load balancing algorithm applied, and a reasonable monitor to make sure requests don't fail somewhere in between the asynchronous DNS queries. It's not as real-time as using RESOLV::lookup, but it's a lot less expensive.