MINOR: stream: switch from conn->addr.{from,to} to conn->{src,dst}

No allocation is needed there. Some extra checks were added in the
stream dump code to make sure the source address is effectively valid
(it always is but it doesn't cost much to be certain).
diff --git a/src/stream.c b/src/stream.c
index fb5555c..0be1757 100644
--- a/src/stream.c
+++ b/src/stream.c
@@ -2886,7 +2886,7 @@
 	csf = objt_cs(si_f->end);
 	cof = cs_conn(csf);
 	acf = objt_appctx(si_f->end);
-	if (cof && addr_to_str(&cof->addr.from, pn, sizeof(pn)) >= 0)
+	if (cof && cof->src && addr_to_str(cof->src, pn, sizeof(pn)) >= 0)
 		src = pn;
 	else if (acf)
 		src = acf->applet->name;
@@ -3057,11 +3057,11 @@
 			     strm_li(strm) ? strm_li(strm)->proto->name : "?");
 
 		conn = objt_conn(strm_orig(strm));
-		switch (conn ? addr_to_str(&conn->addr.from, pn, sizeof(pn)) : AF_UNSPEC) {
+		switch (conn && conn_get_src(conn) ? addr_to_str(conn->src, pn, sizeof(pn)) : AF_UNSPEC) {
 		case AF_INET:
 		case AF_INET6:
 			chunk_appendf(&trash, " source=%s:%d\n",
-			              pn, get_host_port(&conn->addr.from));
+			              pn, get_host_port(conn->src));
 			break;
 		case AF_UNIX:
 			chunk_appendf(&trash, " source=unix:%d\n", strm_li(strm)->luid);
@@ -3083,11 +3083,11 @@
 			     strm_li(strm) ? strm_li(strm)->name ? strm_li(strm)->name : "?" : "?",
 			     strm_li(strm) ? strm_li(strm)->luid : 0);
 
-		switch (conn && conn_get_dst(conn) ? addr_to_str(&conn->addr.to, pn, sizeof(pn)) : AF_UNSPEC) {
+		switch (conn && conn_get_dst(conn) ? addr_to_str(conn->dst, pn, sizeof(pn)) : AF_UNSPEC) {
 		case AF_INET:
 		case AF_INET6:
 			chunk_appendf(&trash, " addr=%s:%d\n",
-				     pn, get_host_port(&conn->addr.to));
+				     pn, get_host_port(conn->dst));
 			break;
 		case AF_UNIX:
 			chunk_appendf(&trash, " addr=unix:%d\n", strm_li(strm)->luid);
@@ -3109,11 +3109,11 @@
 		cs = objt_cs(strm->si[1].end);
 		conn = cs_conn(cs);
 
-		switch (conn && conn_get_src(conn) ? addr_to_str(&conn->addr.from, pn, sizeof(pn)) : AF_UNSPEC) {
+		switch (conn && conn_get_src(conn) ? addr_to_str(conn->src, pn, sizeof(pn)) : AF_UNSPEC) {
 		case AF_INET:
 		case AF_INET6:
 			chunk_appendf(&trash, " addr=%s:%d\n",
-				     pn, get_host_port(&conn->addr.from));
+				     pn, get_host_port(conn->src));
 			break;
 		case AF_UNIX:
 			chunk_appendf(&trash, " addr=unix\n");
@@ -3132,11 +3132,11 @@
 		else
 			chunk_appendf(&trash, "  server=<NONE> (id=-1)");
 
-		switch (conn && conn_get_dst(conn) ? addr_to_str(&conn->addr.to, pn, sizeof(pn)) : AF_UNSPEC) {
+		switch (conn && conn_get_dst(conn) ? addr_to_str(conn->dst, pn, sizeof(pn)) : AF_UNSPEC) {
 		case AF_INET:
 		case AF_INET6:
 			chunk_appendf(&trash, " addr=%s:%d\n",
-				     pn, get_host_port(&conn->addr.to));
+				     pn, get_host_port(conn->dst));
 			break;
 		case AF_UNIX:
 			chunk_appendf(&trash, " addr=unix\n");
@@ -3459,13 +3459,13 @@
 				     strm_li(curr_strm) ? strm_li(curr_strm)->proto->name : "?");
 
 			conn = objt_conn(strm_orig(curr_strm));
-			switch (conn ? addr_to_str(&conn->addr.from, pn, sizeof(pn)) : AF_UNSPEC) {
+			switch (conn && conn_get_src(conn) ? addr_to_str(conn->src, pn, sizeof(pn)) : AF_UNSPEC) {
 			case AF_INET:
 			case AF_INET6:
 				chunk_appendf(&trash,
 					     " src=%s:%d fe=%s be=%s srv=%s",
 					     pn,
-					     get_host_port(&conn->addr.from),
+					     get_host_port(conn->src),
 					     strm_fe(curr_strm)->id,
 					     (curr_strm->be->cap & PR_CAP_BE) ? curr_strm->be->id : "<NONE>",
 					     objt_server(curr_strm->target) ? objt_server(curr_strm->target)->id : "<none>"