sfeed_tail: replace hashmap + linked-list with RBtree

- This is much more memory efficient. I have not done any speed comparison
  yet but it is not noticable atleast.
- add BSD <sys/tree.h>

1 files changed, 4 insertions, 3 deletions

diff --git a/Makefile b/Makefile
index 0e312b3..a7b85df 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,10 @@ SCRIPTS = \
 	sfeed_update
 
 SRC = ${BIN:=.c}
+HDR = \
+	tree.h\
+	util.h\
+	xml.h
 
 LIBUTIL = libutil.a
 LIBUTILSRC = \
@@ -43,9 +47,6 @@ DOC = \
 	README\
 	README.xml\
 	TODO
-HDR = \
-	util.h\
-	xml.h
 
 all: $(BIN)