CLEANUP: mux-fcgi: rename the "endp" field to "sd"

The stream endpoint descriptor that was named "endp" is now called "sd"
both in the fcgi_strm struct and in the few functions using this. The
name was also updated in the "show fd" output.
diff --git a/src/mux_fcgi.c b/src/mux_fcgi.c
index 6d12a23..c93f7c8 100644
--- a/src/mux_fcgi.c
+++ b/src/mux_fcgi.c
@@ -154,7 +154,7 @@
 
 /* FCGI stream descriptor */
 struct fcgi_strm {
-	struct sedesc *endp;
+	struct sedesc *sd;
 	struct session *sess;
 	struct fcgi_conn *fconn;
 
@@ -378,7 +378,7 @@
 
 /* a dmumy management stream */
 static const struct fcgi_strm *fcgi_mgmt_stream = &(const struct fcgi_strm){
-	.endp      = (struct sedesc*)&closed_ep,
+	.sd        = (struct sedesc*)&closed_ep,
 	.fconn     = NULL,
 	.state     = FCGI_SS_CLOSED,
 	.flags     = FCGI_SF_NONE,
@@ -387,7 +387,7 @@
 
 /* and a dummy idle stream for use with any unknown stream */
 static const struct fcgi_strm *fcgi_unknown_stream = &(const struct fcgi_strm){
-	.endp      = (struct sedesc*)&closed_ep,
+	.sd        = (struct sedesc*)&closed_ep,
 	.fconn     = NULL,
 	.state     = FCGI_SS_IDLE,
 	.flags     = FCGI_SF_NONE,
@@ -425,7 +425,7 @@
 /* returns the stconn associated to the FCGI stream */
 static forceinline struct stconn *fcgi_strm_sc(const struct fcgi_strm *fstrm)
 {
-	return fstrm->endp->sc;
+	return fstrm->sd->sc;
 }
 
 
@@ -927,7 +927,7 @@
 			fstrm->state = FCGI_SS_ERROR;
 			TRACE_STATE("switching to ERROR", FCGI_EV_FSTRM_ERR, fstrm->fconn->conn, fstrm);
 		}
-		se_fl_set_error(fstrm->endp);
+		se_fl_set_error(fstrm->sd);
 	}
 }
 
@@ -1013,7 +1013,7 @@
 		if (!fstrm->id)
 			fstrm->fconn->nb_reserved--;
 		if (fcgi_strm_sc(fstrm)) {
-			if (!se_fl_test(fstrm->endp, SE_FL_EOS) && !b_data(&fstrm->rxbuf))
+			if (!se_fl_test(fstrm->sd, SE_FL_EOS) && !b_data(&fstrm->rxbuf))
 				fcgi_strm_notify_recv(fstrm);
 		}
 		fstrm->state = FCGI_SS_CLOSED;
@@ -1045,8 +1045,8 @@
 	 */
 	LIST_DEL_INIT(&fstrm->send_list);
 	tasklet_free(fstrm->shut_tl);
-	BUG_ON(fstrm->endp && !se_fl_test(fstrm->endp, SE_FL_ORPHAN));
-	sedesc_free(fstrm->endp);
+	BUG_ON(fstrm->sd && !se_fl_test(fstrm->sd, SE_FL_ORPHAN));
+	sedesc_free(fstrm->sd);
 	pool_free(pool_head_fcgi_strm, fstrm);
 
 	TRACE_LEAVE(FCGI_EV_FSTRM_END, conn);
@@ -1081,7 +1081,7 @@
 	fstrm->shut_tl->context = fstrm;
 	LIST_INIT(&fstrm->send_list);
 	fstrm->fconn = fconn;
-	fstrm->endp = NULL;
+	fstrm->sd = NULL;
 	fstrm->flags = FCGI_SF_NONE;
 	fstrm->proto_status = 0;
 	fstrm->state = FCGI_SS_IDLE;
@@ -1137,7 +1137,7 @@
 	}
 	if (sc_attach_mux(sc, fstrm, fconn->conn) < 0)
 		goto out;
-	fstrm->endp = sc->sedesc;
+	fstrm->sd = sc->sedesc;
 	fstrm->sess = sess;
 	fconn->nb_sc++;
 
@@ -1178,9 +1178,9 @@
 	}
 
 	if ((fconn->state == FCGI_CS_CLOSED || fconn->conn->flags & CO_FL_ERROR)) {
-		se_fl_set(fstrm->endp, SE_FL_ERR_PENDING);
-		if (se_fl_test(fstrm->endp, SE_FL_EOS))
-			se_fl_set(fstrm->endp, SE_FL_ERROR);
+		se_fl_set(fstrm->sd, SE_FL_ERR_PENDING);
+		if (se_fl_test(fstrm->sd, SE_FL_EOS))
+			se_fl_set(fstrm->sd, SE_FL_ERROR);
 
 		if (fstrm->state < FCGI_SS_ERROR) {
 			fstrm->state = FCGI_SS_ERROR;
@@ -2628,10 +2628,10 @@
 		     fcgi_conn_read0_pending(fconn) ||
 		     fstrm->state == FCGI_SS_CLOSED ||
 		     (fstrm->flags & FCGI_SF_ES_RCVD) ||
-		     se_fl_test(fstrm->endp, SE_FL_ERROR | SE_FL_ERR_PENDING | SE_FL_EOS))) {
+		     se_fl_test(fstrm->sd, SE_FL_ERROR | SE_FL_ERR_PENDING | SE_FL_EOS))) {
 			/* we may have to signal the upper layers */
 			TRACE_DEVEL("notifying stream before switching SID", FCGI_EV_RX_RECORD|FCGI_EV_STRM_WAKE, fconn->conn, fstrm);
-			se_fl_set(fstrm->endp, SE_FL_RCV_MORE);
+			se_fl_set(fstrm->sd, SE_FL_RCV_MORE);
 			fcgi_strm_notify_recv(fstrm);
 		}
 		fstrm = tmp_fstrm;
@@ -2709,10 +2709,10 @@
 	     fcgi_conn_read0_pending(fconn) ||
 	     fstrm->state == FCGI_SS_CLOSED ||
 	     (fstrm->flags & FCGI_SF_ES_RCVD) ||
-	     se_fl_test(fstrm->endp, SE_FL_ERROR | SE_FL_ERR_PENDING | SE_FL_EOS))) {
+	     se_fl_test(fstrm->sd, SE_FL_ERROR | SE_FL_ERR_PENDING | SE_FL_EOS))) {
 		/* we may have to signal the upper layers */
 		TRACE_DEVEL("notifying stream before switching SID", FCGI_EV_RX_RECORD|FCGI_EV_STRM_WAKE, fconn->conn, fstrm);
-		se_fl_set(fstrm->endp, SE_FL_RCV_MORE);
+		se_fl_set(fstrm->sd, SE_FL_RCV_MORE);
 		fcgi_strm_notify_recv(fstrm);
 	}
 
@@ -3124,7 +3124,7 @@
 
 		while (node) {
 			fstrm = container_of(node, struct fcgi_strm, by_id);
-			if (fcgi_strm_sc(fstrm) && se_fl_test(fstrm->endp, SE_FL_WAIT_FOR_HS))
+			if (fcgi_strm_sc(fstrm) && se_fl_test(fstrm->sd, SE_FL_WAIT_FOR_HS))
 				fcgi_strm_notify_recv(fstrm);
 			node = eb32_next(node);
 		}
@@ -3527,13 +3527,13 @@
  * Attach a new stream to a connection
  * (Used for outgoing connections)
  */
-static int fcgi_attach(struct connection *conn, struct sedesc *endp, struct session *sess)
+static int fcgi_attach(struct connection *conn, struct sedesc *sd, struct session *sess)
 {
 	struct fcgi_strm *fstrm;
 	struct fcgi_conn *fconn = conn->ctx;
 
 	TRACE_ENTER(FCGI_EV_FSTRM_NEW, conn);
-	fstrm = fcgi_stconn_new(fconn, endp->sc, sess);
+	fstrm = fcgi_stconn_new(fconn, sd->sc, sess);
 	if (!fstrm)
 		goto err;
 
@@ -3587,9 +3587,9 @@
 /*
  * Detach the stream from the connection and possibly release the connection.
  */
-static void fcgi_detach(struct sedesc *endp)
+static void fcgi_detach(struct sedesc *sd)
 {
-	struct fcgi_strm *fstrm = endp->se;
+	struct fcgi_strm *fstrm = sd->se;
 	struct fcgi_conn *fconn;
 	struct session *sess;
 
@@ -3728,7 +3728,7 @@
 	 * for example because of a "tcp-request content reject" rule that is
 	 * normally used to limit abuse.
 	 */
-	if (se_fl_test(fstrm->endp, SE_FL_KILL_CONN) &&
+	if (se_fl_test(fstrm->sd, SE_FL_KILL_CONN) &&
 	    !(fconn->flags & (FCGI_CF_ABRTS_SENT|FCGI_CF_ABRTS_FAILED))) {
 		TRACE_STATE("stream wants to kill the connection", FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
 		fconn->state = FCGI_CS_CLOSED;
@@ -3789,7 +3789,7 @@
 		 * for example because of a "tcp-request content reject" rule that is
 		 * normally used to limit abuse.
 		 */
-		if (se_fl_test(fstrm->endp, SE_FL_KILL_CONN) &&
+		if (se_fl_test(fstrm->sd, SE_FL_KILL_CONN) &&
 		    !(fconn->flags & (FCGI_CF_ABRTS_SENT|FCGI_CF_ABRTS_FAILED))) {
 			TRACE_STATE("stream wants to kill the connection", FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
 			fconn->state = FCGI_CS_CLOSED;
@@ -3959,18 +3959,18 @@
 		TRACE_STATE("fstrm rxbuf not allocated", FCGI_EV_STRM_RECV|FCGI_EV_FSTRM_BLK, fconn->conn, fstrm);
 
 	if (b_data(&fstrm->rxbuf))
-		se_fl_set(fstrm->endp, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
+		se_fl_set(fstrm->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
 	else {
-		se_fl_clr(fstrm->endp, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
+		se_fl_clr(fstrm->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
 		if (fstrm->state == FCGI_SS_ERROR || (fstrm->h1m.state == H1_MSG_DONE)) {
-			se_fl_set(fstrm->endp, SE_FL_EOI);
+			se_fl_set(fstrm->sd, SE_FL_EOI);
 			if (!(fstrm->h1m.flags & (H1_MF_VER_11|H1_MF_XFER_LEN)))
-				se_fl_set(fstrm->endp, SE_FL_EOS);
+				se_fl_set(fstrm->sd, SE_FL_EOS);
 		}
 		if (fcgi_conn_read0_pending(fconn))
-			se_fl_set(fstrm->endp, SE_FL_EOS);
-		if (se_fl_test(fstrm->endp, SE_FL_ERR_PENDING))
-			se_fl_set(fstrm->endp, SE_FL_ERROR);
+			se_fl_set(fstrm->sd, SE_FL_EOS);
+		if (se_fl_test(fstrm->sd, SE_FL_ERR_PENDING))
+			se_fl_set(fstrm->sd, SE_FL_ERROR);
 		fcgi_release_buf(fconn, &fstrm->rxbuf);
 	}
 
@@ -4023,7 +4023,7 @@
 
 		if (id < 0) {
 			fcgi_strm_close(fstrm);
-			se_fl_set(fstrm->endp, SE_FL_ERROR);
+			se_fl_set(fstrm->sd, SE_FL_ERROR);
 			TRACE_DEVEL("couldn't get a stream ID, leaving in error", FCGI_EV_STRM_SEND|FCGI_EV_FSTRM_ERR|FCGI_EV_STRM_ERR, fconn->conn, fstrm);
 			return 0;
 		}
@@ -4120,7 +4120,7 @@
 
 	if (fstrm->state == FCGI_SS_ERROR) {
 		TRACE_DEVEL("reporting error to the app-layer stream", FCGI_EV_STRM_SEND|FCGI_EV_FSTRM_ERR|FCGI_EV_STRM_ERR, fconn->conn, fstrm);
-		se_fl_set_error(fstrm->endp);
+		se_fl_set_error(fstrm->sd);
 		if (!(fstrm->flags & FCGI_SF_BEGIN_SENT) || fcgi_strm_send_abort(fconn, fstrm))
 			fcgi_strm_close(fstrm);
 	}
@@ -4192,9 +4192,9 @@
 			      (unsigned int)b_data(&fstrm->rxbuf), b_orig(&fstrm->rxbuf),
 			      (unsigned int)b_head_ofs(&fstrm->rxbuf), (unsigned int)b_size(&fstrm->rxbuf),
 			      fcgi_strm_sc(fstrm));
-		if (fstrm->endp) {
-			chunk_appendf(msg, " .endp.flg=0x%08x", se_fl_get(fstrm->endp));
-			if (!se_fl_test(fstrm->endp, SE_FL_ORPHAN))
+		if (fstrm->sd) {
+			chunk_appendf(msg, " .sd.flg=0x%08x", se_fl_get(fstrm->sd));
+			if (!se_fl_test(fstrm->sd, SE_FL_ORPHAN))
 				chunk_appendf(msg, " .sc.flg=0x%08x .sc.app=%p",
 					      fcgi_strm_sc(fstrm)->flags, fcgi_strm_sc(fstrm)->app);
 		}