REORG: include: move fd.h to haproxy/fd{,-t}.h
A few includes were missing in each file. A definition of
struct polled_mask was moved to fd-t.h. The MAX_POLLERS macro was
moved to defaults.h
Stdio used to be silently inherited from whatever path but it's needed
for list_pollers() which takes a FILE* and which can thus not be
forward-declared.
diff --git a/src/peers.c b/src/peers.c
index d4011d3..4d16b41 100644
--- a/src/peers.c
+++ b/src/peers.c
@@ -37,7 +37,7 @@
#include <proto/applet.h>
#include <proto/channel.h>
#include <proto/cli.h>
-#include <proto/fd.h>
+#include <haproxy/fd.h>
#include <proto/frontend.h>
#include <proto/log.h>
#include <proto/mux_pt.h>