[RELEASE] Released version 2.5-dev0

Released version 2.5-dev0 with the following main changes :
    - MINOR: version: it's development again

CHANGELOG

@@ -1,6 +1,9 @@
 ChangeLog :
 ===========
 
+2021/05/14 : 2.5-dev0
+    - MINOR: version: it's development again
+
 2021/05/14 : 2.4.0
     - BUG/MINOR: http_fetch: fix possible uninit sockaddr in fetch_url_ip/port
     - CLEANUP: cli/activity: Remove double spacing in set profiling command

VERSION

@@ -1 +1 @@
-2.4.0
+2.5-dev0

doc/configuration.txt

@@ -2,7 +2,7 @@
                                 HAProxy
                           Configuration Manual
                          ----------------------
-                              version 2.4
+                              version 2.5
                              willy tarreau
                               2021/05/14
 

doc/intro.txt

@@ -1,7 +1,7 @@
                              -----------------------
                               HAProxy Starter Guide
                              -----------------------
-                                   version 2.4
+                                   version 2.5
 
 
 This document is an introduction to HAProxy for all those who don't know it, as

doc/management.txt

@@ -1,7 +1,7 @@
                              ------------------------
                              HAProxy Management Guide
                              ------------------------
-                                   version 2.4
+                                   version 2.5
 
 
 This document describes how to start, stop, manage, and troubleshoot HAProxy,

include/haproxy/version.h

@@ -33,7 +33,7 @@
 #ifdef  CONFIG_PRODUCT_BRANCH
 #define PRODUCT_BRANCH    CONFIG_PRODUCT_BRANCH
 #else
-#define PRODUCT_BRANCH   "2.4"
+#define PRODUCT_BRANCH   "2.5"
 #endif
 
 #ifdef  CONFIG_PRODUCT_STATUS