[RELEASE] Released version 2.1-dev0

Released version 2.1-dev0 with the following main changes :
    - exact copy of 2.0.0
diff --git a/doc/configuration.txt b/doc/configuration.txt
index fd06b1a..3e402fb 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -2,7 +2,7 @@
                                 HAProxy
                           Configuration Manual
                          ----------------------
-                              version 2.0
+                              version 2.1
                              willy tarreau
                               2019/06/16
 
diff --git a/doc/intro.txt b/doc/intro.txt
index a60844c..0ee9fa2 100644
--- a/doc/intro.txt
+++ b/doc/intro.txt
@@ -1,7 +1,7 @@
                              -----------------------
                               HAProxy Starter Guide
                              -----------------------
-                                   version 2.0
+                                   version 2.1
 
 
 This document is an introduction to HAProxy for all those who don't know it, as
diff --git a/doc/management.txt b/doc/management.txt
index 616a040..93bee67 100644
--- a/doc/management.txt
+++ b/doc/management.txt
@@ -1,7 +1,7 @@
                              ------------------------
                              HAProxy Management Guide
                              ------------------------
-                                   version 2.0
+                                   version 2.1
 
 
 This document describes how to start, stop, manage, and troubleshoot HAProxy,