[RELEASE] Released version 2.8.7

Released version 2.8.7 with the following main changes :
    - BUG/MAJOR: ssl/ocsp: crash with ocsp when old process exit or using ocsp CLI
diff --git a/doc/configuration.txt b/doc/configuration.txt
index fb19beb..0791ed1 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -3,7 +3,7 @@
                           Configuration Manual
                          ----------------------
                               version 2.8
-                              2024/02/15
+                              2024/02/26
 
 
 This document covers the configuration language as implemented in the version