Signed-off-by: Rainer Gerhards <rgerhards@adiscon.com>

Signed-off-by: Rainer Gerhards <rgerhards@adiscon.com>

...which enables to configure HUP to be either a full restart
or "just" a leightweight way to close open files

...to enable users to turn off pthread_yield calls which are
counter-productive on multiprocessor machines (but have been
shown to be useful on uniprocessors)

...which enables to work with
less acurate timestamps in favor of performance. This enables querying
of the time only every n-th time if imudp is running in the tight
receive loop (aka receiving messsages at a high rate)

Conflicts:

	runtime/net.c