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

Only minor change was to make sure all defines were before the structs
in spoe-t.h, everything else went smoothly.
diff --git a/contrib/mod_defender/defender.c b/contrib/mod_defender/defender.c
index 8bc3e97..5e759b5 100644
--- a/contrib/mod_defender/defender.c
+++ b/contrib/mod_defender/defender.c
@@ -21,10 +21,9 @@
 #include <haproxy/api.h>
 #include <haproxy/tools.h>
 #include <haproxy/chunk.h>
+#include <haproxy/spoe.h>
 #include <haproxy/time.h>
 
-#include <proto/spoe.h>
-
 #include <http_core.h>
 #include <http_main.h>
 #include <http_log.h>