8527 tty buffer/queue sizes should be larger

@@ -137,12 +137,12 @@
  */
 static struct module_info pts_info = {
         0xface,
         "pts",
         0,
-        512,
-        512,
+        _TTY_BUFSIZ,
+        _TTY_BUFSIZ,
         128
 };
 
 static struct qinit ptsrint = {
         NULL,

@@ -407,11 +407,11 @@
 
         mop->b_datap->db_type = M_SETOPTS;
         mop->b_wptr += sizeof (struct stroptions);
         sop = (struct stroptions *)mop->b_rptr;
         sop->so_flags = SO_HIWAT | SO_LOWAT | SO_ISTTY;
-        sop->so_hiwat = 512;
+        sop->so_hiwat = _TTY_BUFSIZ;
         sop->so_lowat = 256;
         putnext(rqp, mop);
 
         return (0);
 }