Support UTF-8 encoded Unicode for user communications.

(NF_UTF8, togg): New client flag.
(flash, wall): User text input filtering.
(parse, prmptrd): Normal text input filtering.
(uprmptrd, ugetstring): New, to get user text.
(getele, flash, wall): Use them.
(getele): No need to filter out funny characters; input filtering
takes care of them.
(sendmessage, ufindbreak): Work on user text.
(uprnf): New, to print user text.
(rea, gamedown, show_motd): Use it.
(prnf): Unused, remove.
(pr, upr_player): Normal text output filtering (with highlighting).
(pr_flash): User text output filtering.

src/lib/gen/parse.c

@@ -79,7 +79,10 @@ parse(register s_char *buf, s_char **argpp, s_char **condp, s_char *space,
 		quoted = !quoted;
 		buf++;
 	    } else {
-		*bp1++ = *buf++;
+		if (*buf >= 0x20 && *buf <= 0x7e)
+		    *bp1++ = *buf++;
+		else
+		    buf++;
 	    }
 	}
 	*bp1++ = 0;