REORG: include: move port_range.h to haproxy/port_range{,-t}.h

The port ranges didn't depend on anything. However they were missing
some includes such as stdlib and api-t.h which were added.
diff --git a/src/fd.c b/src/fd.c
index c7bc54e..56a0b7b 100644
--- a/src/fd.c
+++ b/src/fd.c
@@ -93,7 +93,7 @@
 
 #include <proto/fd.h>
 #include <proto/log.h>
-#include <proto/port_range.h>
+#include <haproxy/port_range.h>
 
 struct fdtab *fdtab = NULL;     /* array of all the file descriptors */
 struct polled_mask *polled_mask = NULL; /* Array for the polled_mask of each fd */