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/src/compression.c b/src/compression.c
index a63eeef..154d629 100644
--- a/src/compression.c
+++ b/src/compression.c
@@ -36,7 +36,7 @@
 
 #include <proto/acl.h>
 #include <proto/compression.h>
-#include <proto/freq_ctr.h>
+#include <haproxy/freq_ctr.h>
 #include <proto/stream.h>