DOC: config: Add the missing tune.fail-alloc option from global listing
This global option is documented but it is not in the list of supported
options for the global section. So let's add it.
This patch could be backported to all stable versions.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index b13b97c..3c60634 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -1124,6 +1124,7 @@
- tune.bufsize
- tune.comp.maxlevel
- tune.disable-fast-forward
+ - tune.fail-alloc
- tune.fd.edge-triggered
- tune.h2.header-table-size
- tune.h2.initial-window-size