DOC: typo on stick-store response

It is used to store responses, and not requests.

backport: 1.5 and above
(cherry picked from commit 2f2d2ec164fd8807da2720a3b60c4273ff38bad4)
(cherry picked from commit cc41baafb065b664a07f7d80a552a3562411eaa9)
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 2217aef..5003323 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -7081,7 +7081,7 @@
 
 
 stick store-response <pattern> [table <table>] [{if | unless} <condition>]
-  Define a request pattern used to create an entry in a stickiness table
+  Define a response pattern used to create an entry in a stickiness table
   May be used in sections :   defaults | frontend | listen | backend
                                  no    |    no    |   yes  |   yes