[gnome-session/benzea/systemd-documentation: 1/4] doc: Mention that session saving does not work on systemd

[Benjamin Berg <bberg src gnome org>]

commit 58f8ef982775dd6a53353fe02f4b73d3b8765785
Author: Benjamin Berg <bberg redhat com>
Date:   Mon Dec 9 16:25:28 2019 +0100

    doc: Mention that session saving does not work on systemd

 doc/man/gnome-session.1 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/doc/man/gnome-session.1 b/doc/man/gnome-session.1
index bf9cf808..899abd96 100644
--- a/doc/man/gnome-session.1
+++ b/doc/man/gnome-session.1
@@ -24,7 +24,8 @@ file that is looked for in
 .PP
 When saving a session, \fIgnome-session\fP saves the currently running
 applications in the \fB$XDG_CONFIG_HOME/gnome-session/saved-session\fP
-directory.
+directory. Saving sessions is only supported with the legacy non-systemd
+startup method.
 .PP
 \fIgnome-session\fP is an X11R6 session manager. It can manage GNOME
 applications as well as any X11R6 SM compliant application.