Use a shorter name for the channel close bug.

The old name was too long for the Windows configuration dialog, so the
last word got lost.

config.c

@@ -2594,8 +2594,8 @@ void setup_config_box(struct controlbox *b, int midsession,
 	    ctrl_droplist(s, "Ignores SSH-2 maximum packet size", 'x', 20,
 			  HELPCTX(ssh_bugs_maxpkt2),
 			  sshbug_handler, I(CONF_sshbug_maxpkt2));
-	    ctrl_droplist(s, "Replies to channel requests after channel close",
-                          'q', 20, HELPCTX(ssh_bugs_chanreq),
+	    ctrl_droplist(s, "Replies to requests on closed channels", 'q', 20,
+			  HELPCTX(ssh_bugs_chanreq),
 			  sshbug_handler, I(CONF_sshbug_chanreq));
 	}
     }

doc/config.but

@@ -3343,7 +3343,7 @@ believes the server has this bug, it will never send its
 \cq{winadj@putty.projects.tartarus.org} request, and will make do
 without its timing data.
 
-\S{config-ssh-bug-chanreq} \q{Replies to channel requests after channel close}
+\S{config-ssh-bug-chanreq} \q{Replies to requests on closed channels}
 
 \cfg{winhelp-topic}{ssh.bugs.chanreq}