DOC: indicate that weight zero is reported as DRAIN
It's not the same state but reported as such.
(cherry picked from commit c5af3a6d15358fa8b5be6151239862efde4c36f7)
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 1e32057..98909ab 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -8649,7 +8649,9 @@
- An ASCII representation of a positive integer percentage, e.g. "75%".
Values in this format will set the weight proportional to the initial
- weight of a server as configured when haproxy starts.
+ weight of a server as configured when haproxy starts. Note that a zero
+ weight is reported on the stats page as "DRAIN" since it has the same
+ effect on the server (it's removed from the LB farm).
- The word "ready". This will turn the server's administrative state to the
READY mode, thus cancelling any DRAIN or MAINT state