change #include "server.h" to <server/server.h>

Changes from the flat namespace to heirarchical one.  Instead of writing:

	#include "server.h"

the following form should be used.

	#include <server/server.h>

The exception is from .c files in the same directory.

src/helper/options.c

@@ -26,7 +26,7 @@
 
 #include "configuration.h"
 // @todo the inclusion of server.h here is a layering violation
-#include "server.h"
+#include <server/server.h>
 
 #include <getopt.h>