apply_low.h

  * Now uses get_cpu_time() instead of gethrtime().
  * Added PROFILING_DEBUG and corresponding DO_IF_PROFILING_DEBUG() (verbose).
  * Renamed Pike_interpreter.time_base to Pike_interpreter.unlocked_time.
  * Removed unused macro low_return_profiling().
  * Profiling information is now updated by POP_PIKE_FRAME().
  * Fixed various bugs causing negative self_time accounting.
  * Added PIKE_DEBUG checks verifying positive profiling accounting.
  * Removed unused field time_base from struct thread_state.

Rev: src/apply_low.h:1.28
Rev: src/builtin_functions.c:1.558
Rev: src/global.h:1.99
Rev: src/interpret.c:1.349
Rev: src/interpret.h:1.152
Rev: src/interpret_functions.h:1.168
Rev: src/pike_threadlib.h:1.54
Rev: src/program.h:1.203
Rev: src/threads.h:1.128