Prompted by PR: 13476, 13477 Submitted by: KATO Tsuguru
Nagged by: distfile checker (old master site had gone)
Nagged by: Distfile checker
via icmp status, eg: tcp or udp. It speaks http as well, so it can "ping" a http server or a http proxy cache to make sure it's operating and not wedged. (Nearly all of our system lockups are not detected by icmp pings)