BUG/MEDIUM: da: cast the chunk to string.

in fetch mode, the output was incorrect, setting the type to string
explicitally.

This should be backported to all stable versions.

(cherry picked from commit 7df4185f3c0ca87fb1fe47522af452d98e0e36e7)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 9d6e733)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit ea764c5)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 21c34e6)
Signed-off-by: Willy Tarreau <w@1wt.eu>

src/da.c

@@ -220,6 +220,7 @@ static int da_haproxy(const struct arg *args, struct sample *smp, da_deviceinfo_
 
 	smp->data.u.str.str = tmp->str;
 	smp->data.u.str.len = tmp->len;
+	smp->data.type = SMP_T_STR;
 
 	return 1;
 }