Allow to compress on-the-wire data using two algorithms:

- HOLE - it simply turns all-zero blocks into few bytes header;
	it is extremely fast, so it is turned on by default;
	it is mostly intended to speed up initial synchronization
	where we expect many zeros;
- LZF - very fast algorithm by Marc Alexander Lehmann, which shows
	very decent compression ratio and has BSD license.

MFC after:	2 weeks

1 files changed, 2 insertions, 0 deletions

diff --git a/sbin/hastd/hast_proto.c b/sbin/hastd/hast_proto.c
index 3f6c336..a7e1449 100644
--- a/sbin/hastd/hast_proto.c
+++ b/sbin/hastd/hast_proto.c
@@ -46,6 +46,7 @@ __FBSDID("$FreeBSD$");
 #ifdef HAVE_CRYPTO
 #include "hast_checksum.h"
 #endif
+#include "hast_compression.h"
 #include "hast_proto.h"
 
 struct hast_main_header {
@@ -67,6 +68,7 @@ struct hast_pipe_stage {
 };
 
 static struct hast_pipe_stage pipeline[] = {
+	{ "compression", compression_send, compression_recv },
 	{ "checksum", checksum_send, checksum_recv }
 };