fix part of #H9397 - hallucinatory mon names

Fix the issue where a hallucinatory monster name which begins with
a slash is having that stripped off as if it was a gendor and/or
personal-name flag.

The main issue was pronouns ignoring hallucination and this doesn't
attempt to address that.

Also, add new hallucinatory name "leathery-winged avian" which has
been lurking for a while.

dat/bogusmon.txt

@@ -1,4 +1,4 @@
-# NetHack 3.6  bogusmon.txt       $NHDT-Date: 1524689579 2018/04/25 20:52:59 $  $NHDT-Branch: NetHack-3.6.0 $:$NHDT-Revision: 1.7 $
+# NetHack 3.6  bogusmon.txt       $NHDT-Date: 1574387024 2019/11/22 01:43:44 $  $NHDT-Branch: NetHack-3.6 $:$NHDT-Revision: 1.8 $
 # Copyright (c) 2016 by Pasi Kallinen
 # NetHack may be freely redistributed.  See license for details.
 #
@@ -189,6 +189,9 @@ Dalek
 microscopic space fleet
 Ravenous Bugblatter Beast of Traal
 
+# The Tough Guide to Fantasyland
+leathery-winged avian
+
 # TMNT
 teenage mutant ninja turtle