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) {
/guix/'>guix</a></td><td class='form'><form method='get'>
<input type='hidden' name='id' value='4cd1fac51ffd3098e606dba78df3186497a5d09c'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=4cd1fac51ffd3098e606dba78df3186497a5d09c'>refs</a><a class='active' href='/guix/log/doc/images'>log</a><a href='/guix/tree/doc/images?id=4cd1fac51ffd3098e606dba78df3186497a5d09c'>tree</a><a href='/guix/commit/doc/images?id=4cd1fac51ffd3098e606dba78df3186497a5d09c'>commit</a><a href='/guix/diff/doc/images?id=4cd1fac51ffd3098e606dba78df3186497a5d09c'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/doc/images'>
<input type='hidden' name='id' value='4cd1fac51ffd3098e606dba78df3186497a5d09c'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=4cd1fac51ffd3098e606dba78df3186497a5d09c'>root</a>/<a href='/guix/log/doc?id=4cd1fac51ffd3098e606dba78df3186497a5d09c'>doc</a>/<a href='/guix/log/doc/images?id=4cd1fac51ffd3098e606dba78df3186497a5d09c'>images</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/doc/images?id=4cd1fac51ffd3098e606dba78df3186497a5d09c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-05-22 16:11:52 +0200'>2020-05-22</span></td><td><a href='/guix/commit/doc/images?id=cd5d5f53228fd5bf96d9f790aa2606ae71fa68d7'>doc: Update 'Bootstrapping' for further binary seed reduction.</a><span class='msg-avail'>...</span></td><td>Jan Nieuwenhuizen</td></tr>
<tr><td><span title='2019-03-14 16:30:19 +0100'>2019-03-14</span></td><td><a href='/guix/commit/doc/images?id=19008a22d18e772062952034c58a15ed341df3b5'>Merge branch 'staging' into core-updates</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-03-13 23:12:43 +0100'>2019-03-13</span></td><td><a href='/guix/commit/doc/images?id=e1c15e8b8e25e14c253ff1212e289565736f6ea7'>doc: Document the graphical installer some more.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>