MINOR: version: back to development, update status message

Update the status message and update INSTALL again.
diff --git a/INSTALL b/INSTALL
index 44413c9..69fe94f 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,16 +1,15 @@
 Installation instructions for HAProxy
 =====================================
 
-HAProxy 2.2 is a long-term supported version, which means that it will get
-fixes for bugs as they are discovered till around Q2 2025 and will not receive
-new features. This version is suitable for general deployment as it is expected
-to receive less frequent updates than regular stable branches which have an odd
-digit in the minor version number. New users are strongly advised encouraged to
-use only such long-term supported versions such as the ones provided by their
-software vendor or Linux distribution. If for any reason you would prefer a
-different version than the one packaged for your system, you want to be certain
-to have all the fixes or to get some commercial support, other choices are
-available at http://www.haproxy.com/.
+This is a development version, so it is expected to break from time to time,
+to add and remove features without prior notification and it should not be used
+in production. If you are not used to build from sources or if you are not used
+to follow updates then it is recommended that instead you use the packages
+provided by your software vendor or Linux distribution. Most of them are taking
+this task seriously and are doing a good job at backporting important fixes. If
+for any reason you'd prefer to use a different version than the one packaged
+for your system, you want to be certain to have all the fixes or to get some
+commercial support, other choices are available at http://www.haproxy.com/.
 
 
 Areas covered in this document