code and re-enable it on Linux platforms (they have clock_nanosleep). Why
did I trigger an interrupt inside a held lock? Hmmm, we should probably
add an _ack semaphore like we do e.g. for ethernet.
sort of barrier synchronisation? Anyhow, the current implementation looks
reasonable enough now when using old LinuxThreads without TLS.
XXX: in the past, the sem_post in sigsuspend_handler would not release the
calling thread thus entering into a mutual waiting condition.
