BUG/MINOR: stats: make "show stat typed desc" work again

As part of the changes to support per-module stats data in 2.3-dev6
with commit ee63d4bd6 ("MEDIUM: stats: integrate static proxies stats
in new stats"), a small change resulted in the description field to
be replaced by the name field, making it pointless. Let's fix this
back.

This should fix issue #1291. Thanks to Nick Ramirez for reporting this
issue.

This patch can be backported to 2.3.

(cherry picked from commit fc8e438637aa926e681c8b7f3fa061021dfb2201)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit b653d2f152a3ab837fea5c3b559e89133031e791)
Signed-off-by: Willy Tarreau <w@1wt.eu>
diff --git a/src/stats.c b/src/stats.c
index 406b24e..6426d94 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -621,8 +621,8 @@
 		if (!stats_emit_typed_data_field(out, &stats[field]))
 			return 0;
 
-		if (flags & STAT_SHOW_FDESC
-		    && !chunk_appendf(out, ":\"%s\"", stat_f[domain][field].name)) {
+		if (flags & STAT_SHOW_FDESC &&
+		    !chunk_appendf(out, ":\"%s\"", stat_f[domain][field].desc)) {
 			return 0;
 		}