Exit after the user's session has finished.  This works around slim's broken
PAM session handling (see
http://developer.berlios.de/bugs/?func=detailbug&bug_id=19102&group_id=2663).

Patch by Eelco Dolstra, from Nixpkgs.

--- slim-1.3.6/app.cpp	2013-10-15 11:02:55.629263422 +0200
+++ slim-1.3.6/app.cpp	2013-10-15 13:00:10.141210784 +0200
@@ -816,7 +822,7 @@
 	StopServer();
 	RemoveLock();
 	while (waitpid(-1, NULL, WNOHANG) > 0); /* Collects all dead childrens */
-	Run();
+	exit(OK_EXIT);
 }
 
 void App::KillAllClients(Bool top) {
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<tr><td><span title='2020-04-13 20:00:29 +0200'>2020-04-13</span></td><td><a href='/guix/commit/gnu/packages/autogen.scm?id=9d89818a359dd0657e4eb7649b29ad4197b8db39'>gnu: autogen: Disable parallel tests.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/autogen.scm (autogen)[arguments]: Add #:parallel-tests?.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-02-24 17:51:29 +0100'>2019-02-24</span></td><td><a href='/guix/commit/gnu/packages/autogen.scm?id=1584b9d680cf2d48811a5dc68edd872872cbc1a4'>gnu: autogen: Update to 5.18.16.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/autogen.scm (autogen): Update to 5.18.16.
[inputs]: Update to guile-2.2.
[arguments]: Add ‘--disable-dependency-tracking’ to #:configure-flags.
Re-indent.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-08-09 02:17:24 +0200'>2018-08-09</span></td><td><a href='/guix/commit/gnu/packages/autogen.scm?id=11c8a6491249e63e98d902d7396b9ac0a2bca947'>gnu: autogen: Update to 5.18.14.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/autogen.scm (autogen): Update to 5.18.14.
[inputs]: Move perl from native-inputs to here...
[native-inputs]: ...and which from inputs to here.
[arguments]: Remove unnecessary ‘/usr/bin/tr’ substitution.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>