Server reorganization:
- moved request handlers to the specific C files
- moved handle management to handle.c
- moved server private includes to server/ instead of include/server/

diff --git a/server/object.c b/server/object.c
index 4a40ac5..b907af3 100644
--- a/server/object.c
+++ b/server/object.c
@@ -11,8 +11,7 @@
 #include <string.h>
 
 #include "winerror.h"
-#include "server.h"
-#include "server/thread.h"
+#include "thread.h"
 
 int debug_level = 0;