[MEDIUM] stream_interface: add and use ->update function to resync

We used to call stream_sock_data_finish() directly at the end of
a session update, but if we want to support non-socket interfaces,
we need to have this function configurable. Now we access it via
->update().
diff --git a/include/types/stream_interface.h b/include/types/stream_interface.h
index 7789323..c9b0e55 100644
--- a/include/types/stream_interface.h
+++ b/include/types/stream_interface.h
@@ -82,12 +82,13 @@
 	int fd;                 /* file descriptor for a stream driver when known */
 	unsigned int flags;
 	unsigned int exp;       /* wake up time for connect, queue, turn-around, ... */
-	int (*connect)(struct stream_interface *, struct proxy *, struct server *,
-		       struct sockaddr *, struct sockaddr *); /* connect function if any */
+	void (*update)(struct stream_interface *); /* update function */
 	void (*shutr)(struct stream_interface *);  /* shutr function */
 	void (*shutw)(struct stream_interface *);  /* shutw function */
 	void (*chk_rcv)(struct stream_interface *);/* chk_rcv function */
 	void (*chk_snd)(struct stream_interface *);/* chk_snd function */
+	int (*connect)(struct stream_interface *, struct proxy *, struct server *,
+		       struct sockaddr *, struct sockaddr *); /* connect function if any */
 	struct buffer *ib, *ob; /* input and output buffers */
 	unsigned int err_type;  /* first error detected, one of SI_ET_* */
 	void *err_loc;          /* commonly the server, NULL when SI_ET_NONE */
diff --git a/src/client.c b/src/client.c
index 76ea122..312d896 100644
--- a/src/client.c
+++ b/src/client.c
@@ -191,11 +191,12 @@
 		s->si[0].err_type = SI_ET_NONE;
 		s->si[0].err_loc = NULL;
 		s->si[0].owner = t;
-		s->si[0].connect = NULL;
+		s->si[0].update = stream_sock_data_finish;
 		s->si[0].shutr = stream_sock_shutr;
 		s->si[0].shutw = stream_sock_shutw;
 		s->si[0].chk_rcv = stream_sock_chk_rcv;
 		s->si[0].chk_snd = stream_sock_chk_snd;
+		s->si[0].connect = NULL;
 		s->si[0].fd = cfd;
 		s->si[0].flags = SI_FL_NONE | SI_FL_CAP_SPLTCP; /* TCP splicing capable */
 		s->si[0].exp = TICK_ETERNITY;
@@ -204,11 +205,12 @@
 		s->si[1].err_type = SI_ET_NONE;
 		s->si[1].err_loc = NULL;
 		s->si[1].owner = t;
-		s->si[1].connect = tcpv4_connect_server;
+		s->si[1].update = stream_sock_data_finish;
 		s->si[1].shutr = stream_sock_shutr;
 		s->si[1].shutw = stream_sock_shutw;
 		s->si[1].chk_rcv = stream_sock_chk_rcv;
 		s->si[1].chk_snd = stream_sock_chk_snd;
+		s->si[1].connect = tcpv4_connect_server;
 		s->si[1].exp = TICK_ETERNITY;
 		s->si[1].fd = -1; /* just to help with debugging */
 		s->si[1].flags = SI_FL_NONE;
diff --git a/src/proto_uxst.c b/src/proto_uxst.c
index c811f64..60efb6d 100644
--- a/src/proto_uxst.c
+++ b/src/proto_uxst.c
@@ -445,11 +445,12 @@
 		s->si[0].err_type = SI_ET_NONE;
 		s->si[0].err_loc = NULL;
 		s->si[0].owner = t;
-		s->si[0].connect = NULL;
+		s->si[0].update = stream_sock_data_finish;
 		s->si[0].shutr = stream_sock_shutr;
 		s->si[0].shutw = stream_sock_shutw;
 		s->si[0].chk_rcv = stream_sock_chk_rcv;
 		s->si[0].chk_snd = stream_sock_chk_snd;
+		s->si[0].connect = NULL;
 		s->si[0].fd = cfd;
 		s->si[0].flags = SI_FL_NONE;
 		s->si[0].exp = TICK_ETERNITY;
@@ -458,11 +459,12 @@
 		s->si[1].err_type = SI_ET_NONE;
 		s->si[1].err_loc = NULL;
 		s->si[1].owner = t;
-		s->si[1].connect = NULL;
+		s->si[1].update = stream_sock_data_finish;
 		s->si[1].shutr = stream_sock_shutr;
 		s->si[1].shutw = stream_sock_shutw;
 		s->si[1].chk_rcv = stream_sock_chk_rcv;
 		s->si[1].chk_snd = stream_sock_chk_snd;
+		s->si[1].connect = NULL;
 		s->si[1].exp = TICK_ETERNITY;
 		s->si[1].fd = -1; /* just to help with debugging */
 		s->si[1].flags = SI_FL_NONE;
diff --git a/src/session.c b/src/session.c
index f0c2d86..6983212 100644
--- a/src/session.c
+++ b/src/session.c
@@ -1163,10 +1163,10 @@
 			session_process_counters(s);
 
 		if (s->rep->cons->state == SI_ST_EST)
-			stream_sock_data_finish(s->rep->cons);
+			s->rep->cons->update(s->rep->cons);
 
 		if (s->req->cons->state == SI_ST_EST)
-			stream_sock_data_finish(s->req->cons);
+			s->req->cons->update(s->req->cons);
 
 		s->req->flags &= ~(BF_READ_NULL|BF_READ_PARTIAL|BF_WRITE_NULL|BF_WRITE_PARTIAL);
 		s->rep->flags &= ~(BF_READ_NULL|BF_READ_PARTIAL|BF_WRITE_NULL|BF_WRITE_PARTIAL);