[gnome-session] gsm-manager: Add comment with historical context

[Colin Walters <walters src gnome org>]

commit c01831c0dea7f6728106ae12090b248f37ad1feb
Author: Colin Walters <walters verbum org>
Date:   Thu Mar 10 16:14:14 2011 -0500

    gsm-manager: Add comment with historical context
    
    https://bugzilla.gnome.org/show_bug.cgi?id=642497

 gnome-session/gsm-manager.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/gnome-session/gsm-manager.c b/gnome-session/gsm-manager.c
index 23b9374..f7616ec 100644
--- a/gnome-session/gsm-manager.c
+++ b/gnome-session/gsm-manager.c
@@ -621,6 +621,15 @@ _start_app (const char *id,
         }
 
         if (manager->priv->phase < GSM_MANAGER_PHASE_APPLICATION) {
+                /* Historical note - apparently,
+                 * e.g. gnome-settings-daemon used to "daemonize", and
+                 * so gnome-session assumes process exit means "ok
+                 * we're done".  Of course this is broken, we don't
+                 * even distinguish between exit code 0 versus not-0,
+                 * nor do we have any metadata which tells us a
+                 * process is going to "daemonize" or not (and
+                 * basically nothing should be anyways).
+                 */
                 g_signal_connect (app,
                                   "exited",
                                   G_CALLBACK (app_registered),