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

In the applet, function arguments and local variables called "cs"
were renamed to "sc" to avoid future confusion.
diff --git a/src/peers.c b/src/peers.c
index 88c397c..6718034 100644
--- a/src/peers.c
+++ b/src/peers.c
@@ -1167,10 +1167,10 @@
  */
 static inline int peer_getline(struct appctx  *appctx)
 {
-	struct stconn *cs = appctx_cs(appctx);
+	struct stconn *sc = appctx_cs(appctx);
 	int n;
 
-	n = co_getline(sc_oc(cs), trash.area, trash.size);
+	n = co_getline(sc_oc(sc), trash.area, trash.size);
 	if (!n)
 		return 0;
 
@@ -1184,7 +1184,7 @@
 	else
 		trash.area[n - 1] = 0;
 
-	co_skip(sc_oc(cs), n);
+	co_skip(sc_oc(sc), n);
 
 	return n;
 }
@@ -1201,7 +1201,7 @@
                                 struct peer_prep_params *params)
 {
 	int ret, msglen;
-	struct stconn *cs = appctx_cs(appctx);
+	struct stconn *sc = appctx_cs(appctx);
 
 	msglen = peer_prepare_msg(trash.area, trash.size, params);
 	if (!msglen) {
@@ -1211,11 +1211,11 @@
 	}
 
 	/* message to buffer */
-	ret = ci_putblk(sc_ic(cs), trash.area, msglen);
+	ret = ci_putblk(sc_ic(sc), trash.area, msglen);
 	if (ret <= 0) {
 		if (ret == -1) {
 			/* No more write possible */
-			sc_need_room(cs);
+			sc_need_room(sc);
 			return -1;
 		}
 		appctx->st0 = PEER_SESS_ST_END;
@@ -1681,7 +1681,7 @@
 static int peer_treat_updatemsg(struct appctx *appctx, struct peer *p, int updt, int exp,
                                 char **msg_cur, char *msg_end, int msg_len, int totl)
 {
-	struct stconn *cs = appctx_cs(appctx);
+	struct stconn *sc = appctx_cs(appctx);
 	struct shared_table *st = p->remote_table;
 	struct stksess *ts, *newts;
 	uint32_t update;
@@ -2024,7 +2024,7 @@
 
  ignore_msg:
 	/* skip consumed message */
-	co_skip(sc_oc(cs), totl);
+	co_skip(sc_oc(sc), totl);
 	TRACE_DEVEL("leaving in error", PEERS_EV_UPDTMSG);
 	return 0;
 
@@ -2133,7 +2133,7 @@
 static inline int peer_treat_definemsg(struct appctx *appctx, struct peer *p,
                                       char **msg_cur, char *msg_end, int totl)
 {
-	struct stconn *cs = appctx_cs(appctx);
+	struct stconn *sc = appctx_cs(appctx);
 	int table_id_len;
 	struct shared_table *st;
 	int table_type;
@@ -2307,7 +2307,7 @@
 	return 1;
 
  ignore_msg:
-	co_skip(sc_oc(cs), totl);
+	co_skip(sc_oc(sc), totl);
 	return 0;
 
  malformed_exit:
@@ -2332,10 +2332,10 @@
                                 uint32_t *msg_len, int *totl)
 {
 	int reql;
-	struct stconn *cs = appctx_cs(appctx);
+	struct stconn *sc = appctx_cs(appctx);
 	char *cur;
 
-	reql = co_getblk(sc_oc(cs), msg_head, 2 * sizeof(char), *totl);
+	reql = co_getblk(sc_oc(sc), msg_head, 2 * sizeof(char), *totl);
 	if (reql <= 0) /* closed or EOL not found */
 		goto incomplete;
 
@@ -2349,11 +2349,11 @@
 	/* Read and Decode message length */
 	msg_head    += *totl;
 	msg_head_sz -= *totl;
-	reql = co_data(sc_oc(cs)) - *totl;
+	reql = co_data(sc_oc(sc)) - *totl;
 	if (reql > msg_head_sz)
 		reql = msg_head_sz;
 
-	reql = co_getblk(sc_oc(cs), msg_head, reql, *totl);
+	reql = co_getblk(sc_oc(sc), msg_head, reql, *totl);
 	if (reql <= 0) /* closed */
 		goto incomplete;
 
@@ -2379,7 +2379,7 @@
 			return -1;
 		}
 
-		reql = co_getblk(sc_oc(cs), trash.area, *msg_len, *totl);
+		reql = co_getblk(sc_oc(sc), trash.area, *msg_len, *totl);
 		if (reql <= 0) /* closed */
 			goto incomplete;
 		*totl += reql;
@@ -2388,7 +2388,7 @@
 	return 1;
 
  incomplete:
-	if (reql < 0 || (sc_oc(cs)->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
+	if (reql < 0 || (sc_oc(sc)->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
 		/* there was an error or the message was truncated */
 		appctx->st0 = PEER_SESS_ST_END;
 		return -1;
@@ -2850,8 +2850,8 @@
  */
 static void peer_io_handler(struct appctx *appctx)
 {
-	struct stconn *cs = appctx_cs(appctx);
-	struct stream *s = __sc_strm(cs);
+	struct stconn *sc = appctx_cs(appctx);
+	struct stream *s = __sc_strm(sc);
 	struct peers *curpeers = strm_fe(s)->parent;
 	struct peer *curpeer = NULL;
 	int reql = 0;
@@ -2860,8 +2860,8 @@
 	int prev_state;
 
 	/* Check if the input buffer is available. */
-	if (sc_ib(cs)->size == 0) {
-		sc_need_room(cs);
+	if (sc_ib(sc)->size == 0) {
+		sc_need_room(sc);
 		goto out;
 	}
 
@@ -2997,7 +2997,7 @@
 					}
 				}
 
-				if (sc_ic(cs)->flags & CF_WRITE_PARTIAL)
+				if (sc_ic(sc)->flags & CF_WRITE_PARTIAL)
 					curpeer->statuscode = PEER_SESS_SC_CONNECTEDCODE;
 
 				reql = peer_getline(appctx);
@@ -3060,7 +3060,7 @@
 				curpeer->flags |= PEER_F_ALIVE;
 
 				/* skip consumed message */
-				co_skip(sc_oc(cs), totl);
+				co_skip(sc_oc(sc), totl);
 				/* loop on that state to peek next message */
 				goto switchstate;
 
@@ -3127,15 +3127,15 @@
 					HA_SPIN_UNLOCK(PEER_LOCK, &curpeer->lock);
 					curpeer = NULL;
 				}
-				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;
 				goto out;
 			}
 		}
 	}
 out:
-	sc_oc(cs)->flags |= CF_READ_DONTWAIT;
+	sc_oc(sc)->flags |= CF_READ_DONTWAIT;
 
 	if (curpeer)
 		HA_SPIN_UNLOCK(PEER_LOCK, &curpeer->lock);