REORG: include: move signal.h to haproxy/signal{,-t}.h
No change was necessary. Include from wdt.c was dropped since unneeded.
diff --git a/src/checks.c b/src/checks.c
index 0cb718b..a9feb79 100644
--- a/src/checks.c
+++ b/src/checks.c
@@ -45,6 +45,7 @@
#include <haproxy/http_htx.h>
#include <haproxy/h1.h>
#include <haproxy/htx.h>
+#include <haproxy/signal.h>
#include <haproxy/task.h>
#include <haproxy/vars.h>
@@ -63,7 +64,6 @@
#include <haproxy/protocol.h>
#include <proto/proxy.h>
#include <proto/server.h>
-#include <proto/signal.h>
#include <proto/stream_interface.h>
#include <proto/log.h>
#include <haproxy/proto_udp.h>