change #include "log.h" to <helper/log.h>

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

	#include "log.h"

the following form should be used.

	#include <helper/log.h>

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

src/server/server.h

@@ -26,7 +26,7 @@
 #ifndef SERVER_H
 #define SERVER_H
 
-#include "log.h"
+#include <helper/log.h>
 
 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>