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/socket.c b/server/socket.c
index 371b10b..7b2033d 100644
--- a/server/socket.c
+++ b/server/socket.c
@@ -18,8 +18,7 @@
 
 #include "config.h"
 #include "server.h"
-
-#include "server/object.h"
+#include "object.h"
 
 /* Some versions of glibc don't define this */
 #ifndef SCM_RIGHTS