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

[Ray Strode <halfline src gnome org>]

commit 763a358e14a948718c893ee4acf84778fb8d656c
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 5165f869..eb4e2fbe 100644
--- a/doc/man/gnome-session.1
+++ b/doc/man/gnome-session.1
@@ -26,7 +26,8 @@ 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.