Remove gendered mons indices from roles, races

There are no longer distinct gendered versions of monsters, so femalenum
is unused (i.e. set to NON_PM) for all roles and races. Take a pass at
removing all uses of/references to femalenum, and rename 'malenum' to
'mnum' since it no longer has any particular association with
gender or sex.

outdated/win/Qt3/qt3_win.cpp

@@ -929,7 +929,7 @@ public:
 #endif
 	)
     {
-	setGlyph(monnum_to_glyph(roles[id].malenum));
+	setGlyph(monnum_to_glyph(roles[id].mnum));
     }
 };
 
@@ -944,7 +944,7 @@ public:
 #endif
 	)
     {
-	setGlyph(monnum_to_glyph(races[id].malenum));
+	setGlyph(monnum_to_glyph(races[id].mnum));
     }
 };