modify "exec" dialog so that it auto-completes based on executables in

_PATH_DEFPATH

add an "ssh-to" dialog which auto-completes based on contents of
 ~/.ssh/known_hosts (M-.)

testing and eyeballing by Simon Kuhnle <simonkuhnle at web.de>, todd@, pedro@
mk@ and David Cathcart <david at cathcart.cx>

ok todd@

conf.c

@@ -189,6 +189,7 @@ conf_setup(struct conf *c)
 		conf_bindkey(c, kbfunc_lock,
 		    XK_Delete, ControlMask|Mod1Mask, 0, NULL);
 		conf_bindkey(c, kbfunc_exec, XK_question, Mod1Mask, 0, NULL);
+		conf_bindkey(c, kbfunc_ssh, XK_period, Mod1Mask, 0, NULL);
 		conf_bindkey(c, kbfunc_client_hide,
 		    XK_Return, Mod1Mask, KBFLAG_NEEDCLIENT, 0);
 		conf_bindkey(c, kbfunc_client_lower,