curses askname()

Noticed when implementing restore-via-menu for curses a couple
of days ago:  The "Who are you?" prompt wouldn't let me cancel
out via <escape>.  I created a character named '\033' which was
displayed as "^[" during play and produced a save file shown by
'ls' as "501?.Z".

To fix this properly, we will need to replace use of wgetnstr()
with something of our own.  That's more work than I feel like
tackling.  This fakes ESC handling if the player is willing to
type <escape><return> rather than just <escape> when terminating
the prompt.

doc/fixes37.0

@@ -1,4 +1,4 @@
-NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.418 $ $NHDT-Date: 1609642144 2021/01/03 02:49:04 $
+NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.420 $ $NHDT-Date: 1609811543 2021/01/05 01:52:23 $
 
 General Fixes and Modified Features
 -----------------------------------
@@ -482,6 +482,11 @@ remove unused vision tables
 
 curses: 'msg_window' option wasn't functional for curses unless the binary
 	also included tty support
+curses: line input that doesn't take place on the bottom line of the message
+	window or in a popup doesn't support ESC to kill partial input or to
+	cancel; "Who are you?" prompt was willing to name a character "^[";
+	have askname() fake the usual ESC handling, but player has to type
+	<escape><return> for that to work
 Qt: at Xp levels above 20 with 'showexp' On, the combined status field
 	"Level:NN/nnnnnnnn" was too big and truncated by a char at each end
 Qt: searching a text window for something that wasn't found and then searching