ref: f8935b5778397074d41a48205e5c7f87d7b531fe
dir: purgatorio/module/grid/announce.m
Announce: module {
PATH: con "/dis/grid/lib/announce.dis";
init: fn();
announce: fn(): (string, ref Sys->Connection); # find a local address, any port, and return its name and an announced connection.
};