core+daemon: eliminate scheduler::{schedule,cancel} wrappers

Also move core/global-io.hpp to daemon/global.hpp

Refs: #4528, #4883
Change-Id: I0b99029f1a19d7451aab57099cd3303b7eb42ff3
diff --git a/tools/ndn-autoconfig/main.cpp b/tools/ndn-autoconfig/main.cpp
index dd7bec6..e69ef89 100644
--- a/tools/ndn-autoconfig/main.cpp
+++ b/tools/ndn-autoconfig/main.cpp
@@ -24,7 +24,6 @@
  */
 
 #include "procedure.hpp"
-#include "core/scheduler.hpp"
 #include "core/version.hpp"
 
 #include <signal.h>
@@ -88,10 +87,10 @@
     proc.getIoService().stop();
   });
 
-  util::Scheduler sched(proc.getIoService());
-  util::scheduler::ScopedEventId runEvt;
+  Scheduler sched(proc.getIoService());
+  scheduler::ScopedEventId runEvt;
   auto scheduleRerun = [&] (time::nanoseconds delay) {
-    runEvt = sched.scheduleEvent(delay, [&] { proc.runOnce(); });
+    runEvt = sched.schedule(delay, [&] { proc.runOnce(); });
   };
 
   proc.onComplete.connect([&] (bool isSuccess) {