REORG: include: split common/xref.h into haproxy/xref{,-t}.h
The type is the only element needed by applet.h and hlua.h, while hlua.c
needs the various functions. XREF_BUSY was placed into the types as well
since it's better to have the special values there.
diff --git a/src/hlua.c b/src/hlua.c
index 5513a7d..0a3362a 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -27,7 +27,7 @@
#include <common/cfgparse.h>
#include <haproxy/thread.h>
#include <haproxy/regex.h>
-#include <common/xref.h>
+#include <haproxy/xref.h>
#include <common/h1.h>
#include <common/standard.h>