REORG: include: move freq_ctr to haproxy/

types/freq_ctr.h was moved to haproxy/freq_ctr-t.h and proto/freq_ctr.h
was moved to haproxy/freq_ctr.h. Files were updated accordingly, no other
change was applied.
diff --git a/include/types/stick_table.h b/include/types/stick_table.h
index 61ca522..122daea 100644
--- a/include/types/stick_table.h
+++ b/include/types/stick_table.h
@@ -31,7 +31,7 @@
 #include <import/eb32tree.h>
 #include <common/memory.h>
 #include <types/dict.h>
-#include <types/freq_ctr.h>
+#include <haproxy/freq_ctr-t.h>
 #include <types/peers.h>
 #include <types/sample.h>