MINOR: stats: improve pending connections description

In order to unify prometheus and stats description, we need to clarify
the description for pending connections.
- remove the BE reference in counters struct, as it is also used in
  servers
- remove reference of `qcur` field in description as it is specific to
  stats implemention
- try to reword cur and max pending connections description

Signed-off-by: William Dauchy <wdauchy@gmail.com>
diff --git a/include/haproxy/counters-t.h b/include/haproxy/counters-t.h
index b896c4d..1ea68dd 100644
--- a/include/haproxy/counters-t.h
+++ b/include/haproxy/counters-t.h
@@ -73,7 +73,7 @@
 
 	unsigned int cps_max;                   /* maximum of new connections received per second */
 	unsigned int sps_max;                   /* maximum of new connections accepted per second (sessions) */
-	unsigned int nbpend_max;                /* max number of pending connections with no server assigned yet (BE only) */
+	unsigned int nbpend_max;                /* max number of pending connections with no server assigned yet */
 	unsigned int cur_sess_max;		/* max number of currently active sessions */
 
 	long long bytes_in;                     /* number of bytes transferred from the client to the server */
diff --git a/src/stats.c b/src/stats.c
index 4b8bd89..fdb8e9a 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -158,8 +158,8 @@
 const struct name_desc stat_fields[ST_F_TOTAL_FIELDS] = {
 	[ST_F_PXNAME]                        = { .name = "pxname",                      .desc = "Proxy name" },
 	[ST_F_SVNAME]                        = { .name = "svname",                      .desc = "Server name" },
-	[ST_F_QCUR]                          = { .name = "qcur",                        .desc = "Current number of connections waiting in the server of backend queue" },
-	[ST_F_QMAX]                          = { .name = "qmax",                        .desc = "Highest value of qcur encountered since process started" },
+	[ST_F_QCUR]                          = { .name = "qcur",                        .desc = "Number of current queued connections" },
+	[ST_F_QMAX]                          = { .name = "qmax",                        .desc = "Highest value of queued connections encountered since process started" },
 	[ST_F_SCUR]                          = { .name = "scur",                        .desc = "Current number of sessions on the frontend, backend or server" },
 	[ST_F_SMAX]                          = { .name = "smax",                        .desc = "Highest value of scur encountered since process started" },
 	[ST_F_SLIM]                          = { .name = "slim",                        .desc = "Frontend/listener/server's maxconn, backend's fullconn" },