CLEANUP: spoe: rename all occurrences of stconn "cs" to "sc"

Function arguments and local variables in the SPOE applet called "cs"
were renamed to "sc" to avoid future confusion.
diff --git a/src/flt_spoe.c b/src/flt_spoe.c
index dabe693..9c92451 100644
--- a/src/flt_spoe.c
+++ b/src/flt_spoe.c
@@ -1137,7 +1137,7 @@
 static int
 spoe_send_frame(struct appctx *appctx, char *buf, size_t framesz)
 {
-	struct stconn *cs = appctx_cs(appctx);
+	struct stconn *sc = appctx_cs(appctx);
 	int      ret;
 	uint32_t netint;
 
@@ -1147,9 +1147,9 @@
 	memcpy(buf, (char *)&netint, 4);
 	ret = applet_putblk(appctx, buf, framesz+4);
 	if (ret <= 0) {
-		if ((ret == -3 && b_is_null(&sc_ic(cs)->buf)) || ret == -1) {
+		if ((ret == -3 && b_is_null(&sc_ic(sc)->buf)) || ret == -1) {
 			/* WT: is this still needed for the case ret==-3 ? */
-			sc_need_room(cs);
+			sc_need_room(sc);
 			return 1; /* retry */
 		}
 		SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
@@ -1164,18 +1164,18 @@
 static int
 spoe_recv_frame(struct appctx *appctx, char *buf, size_t framesz)
 {
-	struct stconn *cs = appctx_cs(appctx);
+	struct stconn *sc = appctx_cs(appctx);
 	int      ret;
 	uint32_t netint;
 
-	ret = co_getblk(sc_oc(cs), (char *)&netint, 4, 0);
+	ret = co_getblk(sc_oc(sc), (char *)&netint, 4, 0);
 	if (ret > 0) {
 		framesz = ntohl(netint);
 		if (framesz > SPOE_APPCTX(appctx)->max_frame_size) {
 			SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_TOO_BIG;
 			return -1;
 		}
-		ret = co_getblk(sc_oc(cs), buf, framesz, 4);
+		ret = co_getblk(sc_oc(sc), buf, framesz, 4);
 	}
 	if (ret <= 0) {
 		if (ret == 0) {
@@ -1266,7 +1266,7 @@
 static void
 spoe_release_appctx(struct appctx *appctx)
 {
-	struct stconn  *cs          = appctx_cs(appctx);
+	struct stconn  *sc          = appctx_cs(appctx);
 	struct spoe_appctx  *spoe_appctx = SPOE_APPCTX(appctx);
 	struct spoe_agent   *agent;
 	struct spoe_context *ctx, *back;
@@ -1301,9 +1301,9 @@
 		if (spoe_appctx->status_code == SPOE_FRM_ERR_NONE)
 			spoe_appctx->status_code = SPOE_FRM_ERR_IO;
 
-		sc_shutw(cs);
-		sc_shutr(cs);
-		sc_ic(cs)->flags |= CF_READ_NULL;
+		sc_shutw(sc);
+		sc_shutr(sc);
+		sc_ic(sc)->flags |= CF_READ_NULL;
 	}
 
 	/* Destroy the task attached to this applet */
@@ -1386,21 +1386,21 @@
 static int
 spoe_handle_connect_appctx(struct appctx *appctx)
 {
-	struct stconn *cs    = appctx_cs(appctx);
+	struct stconn *sc    = appctx_cs(appctx);
 	struct spoe_agent  *agent = SPOE_APPCTX(appctx)->agent;
 	char *frame, *buf;
 	int   ret;
 
-	if (sc_state_in(cs->state, SC_SB_CER|SC_SB_DIS|SC_SB_CLO)) {
+	if (sc_state_in(sc->state, SC_SB_CER|SC_SB_DIS|SC_SB_CLO)) {
 		/* closed */
 		SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
 		goto exit;
 	}
 
-	if (!sc_state_in(cs->state, SC_SB_RDY|SC_SB_EST)) {
+	if (!sc_state_in(sc->state, SC_SB_RDY|SC_SB_EST)) {
 		/* not connected yet */
 		applet_have_more_data(appctx);
-		task_wakeup(__sc_strm(cs)->task, TASK_WOKEN_MSG);
+		task_wakeup(__sc_strm(sc)->task, TASK_WOKEN_MSG);
 		goto stop;
 	}
 
@@ -1452,13 +1452,13 @@
 static int
 spoe_handle_connecting_appctx(struct appctx *appctx)
 {
-	struct stconn *cs     = appctx_cs(appctx);
+	struct stconn *sc     = appctx_cs(appctx);
 	struct spoe_agent  *agent  = SPOE_APPCTX(appctx)->agent;
 	char  *frame;
 	int    ret;
 
 
-	if (cs->state == SC_ST_CLO || sc_opposite(cs)->state == SC_ST_CLO) {
+	if (sc->state == SC_ST_CLO || sc_opposite(sc)->state == SC_ST_CLO) {
 		SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
 		goto exit;
 	}
@@ -1507,7 +1507,7 @@
   next:
 	/* Do not forget to remove processed frame from the output buffer */
 	if (trash.data)
-		co_skip(sc_oc(cs), trash.data);
+		co_skip(sc_oc(sc), trash.data);
 
 	SPOE_APPCTX(appctx)->task->expire =
 		tick_add_ifset(now_ms, agent->timeout.idle);
@@ -1705,12 +1705,12 @@
 static int
 spoe_handle_processing_appctx(struct appctx *appctx)
 {
-	struct stconn      *cs    = appctx_cs(appctx);
-	struct server           *srv   = objt_server(__sc_strm(cs)->target);
+	struct stconn      *sc    = appctx_cs(appctx);
+	struct server           *srv   = objt_server(__sc_strm(sc)->target);
 	struct spoe_agent       *agent = SPOE_APPCTX(appctx)->agent;
 	int ret, skip_sending = 0, skip_receiving = 0, active_s = 0, active_r = 0, close_asap = 0;
 
-	if (cs->state == SC_ST_CLO || sc_opposite(cs)->state == SC_ST_CLO) {
+	if (sc->state == SC_ST_CLO || sc_opposite(sc)->state == SC_ST_CLO) {
 		SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
 		goto exit;
 	}
@@ -1828,12 +1828,12 @@
 static int
 spoe_handle_disconnect_appctx(struct appctx *appctx)
 {
-	struct stconn *cs    = appctx_cs(appctx);
+	struct stconn *sc    = appctx_cs(appctx);
 	struct spoe_agent  *agent = SPOE_APPCTX(appctx)->agent;
 	char *frame, *buf;
 	int   ret;
 
-	if (cs->state == SC_ST_CLO || sc_opposite(cs)->state == SC_ST_CLO)
+	if (sc->state == SC_ST_CLO || sc_opposite(sc)->state == SC_ST_CLO)
 		goto exit;
 
 	if (appctx->st1 == SPOE_APPCTX_ERR_TOUT)
@@ -1881,11 +1881,11 @@
 static int
 spoe_handle_disconnecting_appctx(struct appctx *appctx)
 {
-	struct stconn *cs = appctx_cs(appctx);
+	struct stconn *sc = appctx_cs(appctx);
 	char  *frame;
 	int    ret;
 
-	if (cs->state == SC_ST_CLO || sc_opposite(cs)->state == SC_ST_CLO) {
+	if (sc->state == SC_ST_CLO || sc_opposite(sc)->state == SC_ST_CLO) {
 		SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
 		goto exit;
 	}
@@ -1932,7 +1932,7 @@
   next:
 	/* Do not forget to remove processed frame from the output buffer */
 	if (trash.data)
-		co_skip(sc_oc(cs), trash.data);
+		co_skip(sc_oc(sc), trash.data);
 
 	return 0;
   stop:
@@ -1946,7 +1946,7 @@
 static void
 spoe_handle_appctx(struct appctx *appctx)
 {
-	struct stconn *cs = appctx_cs(appctx);
+	struct stconn *sc = appctx_cs(appctx);
 	struct spoe_agent  *agent;
 
 	if (SPOE_APPCTX(appctx) == NULL)
@@ -2007,9 +2007,9 @@
 			appctx->st0 = SPOE_APPCTX_ST_END;
 			SPOE_APPCTX(appctx)->task->expire = TICK_ETERNITY;
 
-			sc_shutw(cs);
-			sc_shutr(cs);
-			sc_ic(cs)->flags |= CF_READ_NULL;
+			sc_shutw(sc);
+			sc_shutr(sc);
+			sc_ic(sc)->flags |= CF_READ_NULL;
 			/* fall through */
 
 		case SPOE_APPCTX_ST_END: