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-rw-r--r--Documentation/yahns.txt6
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/yahns.txt b/Documentation/yahns.txt
index 9217729..63b96f6 100644
--- a/Documentation/yahns.txt
+++ b/Documentation/yahns.txt
@@ -49,6 +49,10 @@ environment variables will also affect it.
 yahns will update the PWD (current working directory) env if the
 working_directory directive is set (see yahns_config(5)).
 
+LISTEN_FDS and LISTEN_PID variables are used in our emulation
+of sd_listen_fds(3) function.   See sd_listen_fds(3) manpage
+for more details.
+
 # FILES
 
 See yahns_config(5) for documentation on the configuration file format.
@@ -65,4 +69,4 @@ License: GPLv3 or later <http://www.gnu.org/licenses/gpl-3.0.txt>
 
 # SEE ALSO
 
-yahns-rackup(1), yahns_config(5)
+yahns-rackup(1), yahns_config(5), sd_listen_fds(3)