CLEANUP: conn-stream: Don't export internal functions

cs_new() and cs_attach_app() are only used internally. Thus, there is no
reason to export them.
diff --git a/include/haproxy/conn_stream.h b/include/haproxy/conn_stream.h
index 7cf44ad..ab2809d 100644
--- a/include/haproxy/conn_stream.h
+++ b/include/haproxy/conn_stream.h
@@ -38,7 +38,6 @@
 struct cs_endpoint *cs_endpoint_new();
 void cs_endpoint_free(struct cs_endpoint *endp);
 
-struct conn_stream *cs_new(struct cs_endpoint *endp);
 struct conn_stream *cs_new_from_mux(struct cs_endpoint *endp, struct session *sess, struct buffer *input);
 struct conn_stream *cs_new_from_applet(struct cs_endpoint *endp, struct session *sess, struct buffer *input);
 struct conn_stream *cs_new_from_strm(struct stream *strm, unsigned int flags);
@@ -46,7 +45,6 @@
 void cs_free(struct conn_stream *cs);
 
 int cs_attach_mux(struct conn_stream *cs, void *target, void *ctx);
-void cs_attach_applet(struct conn_stream *cs, void *target, void *ctx);
 int cs_attach_strm(struct conn_stream *cs, struct stream *strm);
 
 int cs_reset_endp(struct conn_stream *cs);
diff --git a/src/conn_stream.c b/src/conn_stream.c
index 2747e97..38aaff2 100644
--- a/src/conn_stream.c
+++ b/src/conn_stream.c
@@ -109,7 +109,7 @@
 /* Tries to allocate a new conn_stream and initialize its main fields. On
  * failure, nothing is allocated and NULL is returned.
  */
-struct conn_stream *cs_new(struct cs_endpoint *endp)
+static struct conn_stream *cs_new(struct cs_endpoint *endp)
 {
 	struct conn_stream *cs;
 
@@ -251,7 +251,7 @@
 }
 
 /* Attaches a conn_stream to an applet endpoint and sets the endpoint ctx */
-void cs_attach_applet(struct conn_stream *cs, void *target, void *ctx)
+static void cs_attach_applet(struct conn_stream *cs, void *target, void *ctx)
 {
 	struct appctx *appctx = target;