REORG: include: move common/net_helper.h to haproxy/net_helper.h

No change was necessary.
diff --git a/src/debug.c b/src/debug.c
index 4017232..5b25ab7 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -24,7 +24,7 @@
 #include <haproxy/debug.h>
 #include <haproxy/thread.h>
 #include <import/ist.h>
-#include <common/net_helper.h>
+#include <haproxy/net_helper.h>
 #include <common/standard.h>
 
 #include <types/global.h>