- disconnect notifications from TCP not always as nice as we might want
them to be (but how can we do this cleanly given that UDP is connectionless?)
- TCP not used bi-directionally (especially important also for PONG!)
+ - hostlist testcase shows that (randomly) we jump to an address that
+ seems to be a plugin function *after* the plugin has been unloaded
+ (directly from scheduler); check that *all* plugin tasks are cancelled
+ after plugin is unloaded! (need better testcases for that...)
* STATISTICS:
- synchronous/asynchronous API (& implementation) is not nice;
=> provide notification-based API