MINOR: checks: rename the state flags

The flag CHK_STATE_RUNNING is misleading as one may believe it means
the state is enabled (just like SRV_RUNNING). Let's rename these two
flags CHK_ST_INPROGRESS and CHK_ST_DISABLED.
diff --git a/include/types/checks.h b/include/types/checks.h
index 0af329b..b944cd3 100644
--- a/include/types/checks.h
+++ b/include/types/checks.h
@@ -34,9 +34,9 @@
 	CHK_RES_CONDPASS,               /* check reports the server doesn't want new sessions */
 };
 
-/* check flags */
-#define CHK_STATE_RUNNING	0x0001  /* this check is currently running */
-#define CHK_STATE_DISABLED	0x0002  /* this check is currently administratively disabled */
+/* flags used by check->state */
+#define CHK_ST_INPROGRESS       0x0001  /* a check is currently running */
+#define CHK_ST_DISABLED         0x0002  /* this check is currently administratively disabled */
 
 /* check status */
 enum {
@@ -134,7 +134,7 @@
 	struct tcpcheck_rule *current_step;     /* current step when using tcpcheck */
 	int inter, fastinter, downinter;        /* checks: time in milliseconds */
 	enum chk_result result;                 /* health-check result : CHK_RES_* */
-	int state;				/* health-check result : CHK_* */
+	int state;				/* state of the check : CHK_ST_*   */
 	int health;				/* 0 to rise-1 = bad;
 						 * rise to rise+fall-1 = good */
 	int rise, fall;				/* time in iterations */
diff --git a/src/checks.c b/src/checks.c
index b006542..3215577 100644
--- a/src/checks.c
+++ b/src/checks.c
@@ -1165,7 +1165,7 @@
 		 * parameter of this function is the agent or check field
 		 * of the server.
 		 */
-		disabled = check->server->agent.state & CHK_STATE_DISABLED;
+		disabled = check->server->agent.state & CHK_ST_DISABLED;
 
 		if (strchr(check->bi->data, '%')) {
 			if (disabled)
@@ -1497,7 +1497,7 @@
 	int ret;
 	int expired = tick_is_expired(t->expire, now_ms);
 
-	if (!(check->state & CHK_STATE_RUNNING)) {
+	if (!(check->state & CHK_ST_INPROGRESS)) {
 		/* no check currently running */
 		if (!expired) /* woke up too early */
 			return t;
@@ -1509,13 +1509,13 @@
 		if (!(s->state & SRV_CHECKED) ||
 		    s->proxy->state == PR_STSTOPPED ||
 		    (s->state & SRV_MAINTAIN) ||
-		    (check->state & CHK_STATE_DISABLED))
+		    (check->state & CHK_ST_DISABLED))
 			goto reschedule;
 
 		/* we'll initiate a new check */
 		set_server_check_status(check, HCHK_STATUS_START, NULL);
 
-		check->state |= CHK_STATE_RUNNING;
+		check->state |= CHK_ST_INPROGRESS;
 		check->bi->p = check->bi->data;
 		check->bi->i = 0;
 		check->bo->p = check->bo->data;
@@ -1619,7 +1619,7 @@
 
 		/* here, we have seen a synchronous error, no fd was allocated */
 
-		check->state &= ~CHK_STATE_RUNNING;
+		check->state &= ~CHK_ST_INPROGRESS;
 		check_failed(check);
 
 		/* we allow up to min(inter, timeout.connect) for a connection
@@ -1687,7 +1687,7 @@
 				set_server_up(check);
 			}
 		}
-		check->state &= ~CHK_STATE_RUNNING;
+		check->state &= ~CHK_ST_INPROGRESS;
 
 		rv = 0;
 		if (global.spread_checks > 0) {
diff --git a/src/dumpstats.c b/src/dumpstats.c
index c63464d..ff8557a 100644
--- a/src/dumpstats.c
+++ b/src/dumpstats.c
@@ -1528,8 +1528,7 @@
 			if (!sv)
 				return 1;
 
-			sv->agent.state &= ~CHK_STATE_DISABLED;
-
+			sv->agent.state &= ~CHK_ST_DISABLED;
 			return 1;
 		}
 		if (strcmp(args[1], "server") == 0) {
@@ -1600,8 +1599,7 @@
 			if (!sv)
 				return 1;
 
-			sv->agent.state |= CHK_STATE_DISABLED;
-
+			sv->agent.state |= CHK_ST_DISABLED;
 			return 1;
 		}
 		else if (strcmp(args[1], "server") == 0) {
@@ -2723,7 +2721,7 @@
 		if (sv->state & SRV_CHECKED) {
 			chunk_appendf(&trash,
 			              "</td><td class=ac><u> %s%s",
-			              (sv->check.state & CHK_STATE_RUNNING) ? "* " : "",
+			              (sv->check.state & CHK_ST_INPROGRESS) ? "* " : "",
 			              get_check_status_info(sv->check.status));
 
 			if (sv->check.status >= HCHK_STATUS_L57DATA)