DOC: internal: update missing data types in peers-v2.0.txt

This is apparently the only location where the stored data types are
documented, but it was quite outdated as it stopped at gpc1 rate. This
patch adds the missing types (up to and including gpc_rate).

(cherry picked from commit 668eb9aebf5d751933f05bad161a8f49d1f634b1)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 91e26666284b426085e22b47464df9d496110dbe)
Signed-off-by: Willy Tarreau <w@1wt.eu>
diff --git a/doc/peers-v2.0.txt b/doc/peers-v2.0.txt
index 051cb60..711c949 100644
--- a/doc/peers-v2.0.txt
+++ b/doc/peers-v2.0.txt
@@ -221,6 +221,12 @@
  16: bytes out rate
  17: gpc1
  18: gpc1 rate
+ 19: server key
+ 20: http fail counter
+ 21: http fail rate
+ 22: gpt array
+ 23: gpc array
+ 24: gpc rate array
 
 d) Table Switch Message