-
isc_loop() can now take its place. This also requires changes to the test harness - instead of running the setup and teardown outside of th main loop, we now schedule the setup and teardown to run on the loop (via isc_loop_setup() and isc_loop_teardown()) - this is needed because the new the isc_loop() call has to be run on the active event loop, but previously the isc_loop_current() (and the variants like isc_loop_main()) would work even outside of the loop because it needed just isc_tid() to work, but not the full loop (which was mainly true for the main thread).
