Rate-limit "Problem bootstrapping" warnings to one every 5 seconds
Let's put a rate-limit on warnings like this:
Jan 29 11:36:27.000 [warn] Problem bootstrapping. Stuck at 0% (starting): Starting. (Network is unreachable; NOROUTE; count 11; recommendation warn; host 322C6E3A973BC10FC36DE3037AD27BC89F14723B at 212.83.154.33:8443)