undo CL 69070045 / 8539a916d98a

This breaks ^C in win windows, as expected.
People use ^C, win expects and handles ^C,
so I don't think we can just take it away.

I've noticed that it is broken but assumed my ssh
was screwed up.

If you want to make WindowsKey+C,X,V do the
operations, by analogy with command+C,X,V
on Mac, that's fine with me.

««« original CL description
acme: copy/cut/paste with ctl+c,x,v

LGTM=rsc
R=rsc
CC=plan9port.codebot
https://codereview.appspot.com/69070045

»»»

TBR=rsc
CC=burns.ethan, r
https://codereview.appspot.com/96410045

src/cmd/acme/text.c

@@ -745,12 +745,10 @@ texttype(Text *t, Rune r)
 			q0++;
 		textshow(t, q0, q0, TRUE);
 		return;
-	case 3:		/* ^C: copy */
 	case Kcmd+'c':	/* %C: copy */
 		typecommit(t);
 		cut(t, t, nil, TRUE, FALSE, nil, 0);
 		return;
-	case 0x1a:	/* ^Z: undo */
 	case Kcmd+'z':	/* %Z: undo */
 	 	typecommit(t);
 		undo(t, nil, nil, TRUE, 0, nil, 0);
@@ -779,7 +777,6 @@ texttype(Text *t, Rune r)
 	}
 	/* cut/paste must be done after the seq++/filemark */
 	switch(r){
-	case 0x18:	/* ^X: cut */
 	case Kcmd+'x':	/* %X: cut */
 		typecommit(t);
 		if(t->what == Body){
@@ -790,7 +787,6 @@ texttype(Text *t, Rune r)
 		textshow(t, t->q0, t->q0, 1);
 		t->iq1 = t->q0;
 		return;
-	case 0x16:	/* ^V: paste */
 	case Kcmd+'v':	/* %V: paste */
 		typecommit(t);
 		if(t->what == Body){