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

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

	#include "httpd.h"

the following form should be used.

	#include <server/httpd.h>

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

src/openocd.c

@@ -40,7 +40,7 @@
 
 #include "server.h"
 #include <server/gdb_server.h>
-#include "httpd.h"
+#include <server/httpd.h>
 
 #ifdef HAVE_STRINGS_H
 #include <strings.h>