Changed the boot procedure a bit.

Extracted scheduler_init() from start_scheduler() (which is now called scheduler_start()).
Moved scheduler related function prototypes from thread.h to the new scheduler.h.
Cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14518 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/debug/user_debugger.cpp

@@ -10,6 +10,7 @@
 #include <debugger.h>
 #include <kernel.h>
 #include <KernelExport.h>
+#include <kscheduler.h>
 #include <ksignal.h>
 #include <ksyscalls.h>
 #include <sem.h>