Make paralysis intefere with seduction attempts

tinklebear on IRC noticed that a hero paralyzed by a floating eye was
still "charmed" and capable of "removing her armor" as part of a nymph's
theft attack.  The same thing was true of foocubus seduction: a
paralyzed hero was still able to respond to the questions about whether
particular pieces of armor should be removed (and also do whatever else
may be involved in a successful attack...).

I think paralysis should prevent both those things.  Nymph theft will
still work, unless she needs the hero's active cooperation in removing a
bulky piece of armor.  Foocubus attacks will be prevented entirely by
paralysis, making it interfere like unconsciousness already does.

Apply a similar constraint to hero vs monster seduction, as well.

src/mhitu.c

@@ -1824,7 +1824,7 @@ doseduce(struct monst *mon)
               mhe(mon), mon->mcan ? "severe " : "");
         return 0;
     }
-    if (unconscious()) {
+    if (unresponsive()) {
         pline("%s seems dismayed at your lack of response.", Monnam(mon));
         return 0;
     }