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/proto/activity.h b/include/proto/activity.h
index 9ca9a42..ce6a81b 100644
--- a/include/proto/activity.h
+++ b/include/proto/activity.h
@@ -26,7 +26,7 @@
 #include <haproxy/api.h>
 #include <haproxy/time.h>
 #include <types/activity.h>
-#include <proto/freq_ctr.h>
+#include <haproxy/freq_ctr.h>
 
 /* bit fields for "profiling" */
 #define HA_PROF_TASKS_OFF   0x00000000     /* per-task CPU profiling forced disabled */