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

Just a minor change, moved the macro definitions upwards. A few caller
files were updated since they didn't need to include it.
diff --git a/src/fcgi-app.c b/src/fcgi-app.c
index dda4b3a..9097dab 100644
--- a/src/fcgi-app.c
+++ b/src/fcgi-app.c
@@ -15,6 +15,7 @@
 #include <haproxy/chunk.h>
 #include <common/cfgparse.h>
 #include <haproxy/errors.h>
+#include <haproxy/filters.h>
 #include <haproxy/http_fetch.h>
 #include <haproxy/http_htx.h>
 #include <haproxy/regex.h>
@@ -25,7 +26,6 @@
 #include <haproxy/global.h>
 
 #include <proto/fcgi-app.h>
-#include <proto/filters.h>
 #include <proto/log.h>
 #include <proto/proxy.h>
 #include <proto/server.h>