fix github #172 - ^T inconsistencies; add m^T

Fixes #172

Casting teleport-away via ^T used different requirements for energy,
strength, and hunger than casting it via 'Z'.  The strength and hunger
requirements were more stringent, the energy one more lenient.  When
it rejected a cast attempt due to any of those, it used up the move,
but 'Z' didn't.

When testing my fix, I wanted an easier way than a debugger to control
how ^T interacts with wizard mode, so finally got around to a first
cut at being able to invoke it via wizard mode but not override those
energy/strength/hunger requirements.  It uses the 'm' prefix to ask
for a menu.  'm^T' gives four options about how to teleport.  (There
are other permutations which aren't handled.)

Also noticed while testing:  ^T wouldn't attempt to cast teleport-away
if you didn't know the corresponding spellbook.  'Z' will attempt that
because it is possible to forget a book and still know its spell.

src/cmd.c

@@ -1,4 +1,4 @@
-/* NetHack 3.6	cmd.c	$NHDT-Date: 1546038393 2018/12/28 23:06:33 $  $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.323 $ */
+/* NetHack 3.6	cmd.c	$NHDT-Date: 1546565813 2019/01/04 01:36:53 $  $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.324 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /*-Copyright (c) Robert Patrick Rankin, 2013. */
 /* NetHack may be freely redistributed.  See license for details. */
@@ -4408,8 +4408,8 @@ int NDECL((*cmd_func));
         || cmd_func == doloot
         /* travel: pop up a menu of interesting targets in view */
         || cmd_func == dotravel
-        /* wizard mode ^V */
-        || cmd_func == wiz_level_tele
+        /* wizard mode ^V and ^T */
+        || cmd_func == wiz_level_tele || cmd_func == dotelecmd
         /* 'm' prefix allowed for some extended commands */
         || cmd_func == doextcmd || cmd_func == doextlist)
         return TRUE;