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/daemon/face/multicast-ethernet-transport.cpp b/daemon/face/multicast-ethernet-transport.cpp
index 2afb793..f0fa5ce 100644
--- a/daemon/face/multicast-ethernet-transport.cpp
+++ b/daemon/face/multicast-ethernet-transport.cpp
@@ -24,7 +24,7 @@
  */
 
 #include "multicast-ethernet-transport.hpp"
-#include "core/global-io.hpp"
+#include "daemon/global.hpp"
 
 #include <cerrno>         // for errno
 #include <cstring>        // for memcpy(), strerror(), strncpy()