DOC: Add missing stats fields in the management manual

Following fields was missing : srv_icur, src_ilim, qtime_max, ctime_max,
rtime_max and ttime_max.

(cherry picked from commit 2ac257440943c5e32b2f380acede2c51fc9954e8)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/doc/management.txt b/doc/management.txt
index 7ced38c..2ba460d 100644
--- a/doc/management.txt
+++ b/doc/management.txt
@@ -1103,6 +1103,12 @@
  85: reuse [..BS]: cumulative number of connection reuses
  86: cache_lookups [.FB.]: cumulative number of cache lookups
  87: cache_hits [.FB.]: cumulative number of cache hits
+ 88: srv_icur [...S]: current number of idle connections available for reuse
+ 89: src_ilim [...S]: limit on the number of available idle connections
+ 90. qtime_max [..BS]: the maximum observed queue time in ms
+ 91. ctime_max [..BS]: the maximum observed connect time in ms
+ 92. rtime_max [..BS]: the maximum observed response time in ms (0 for TCP)
+ 93. ttime_max [..BS]: the maximum observed total session time in ms
 
 
 9.2) Typed output format