OS-2288 there is no dialup, only zuul

*** 1261,1272 ****
  }
  
  int
  main(int argc, char *argv[])
  {
-         char *ttyn = ttyname(STDERR_FILENO);
- 
          int qflag = 0, needlog = 1, nosync = 0;
          int fast_reboot = 0;
          int prom_reboot = 0;
          uintptr_t mdep = NULL;
          int cmd, fcn, c, aval, r;
--- 1261,1270 ----
*** 1334,1344 ****
                          break;
                  case 'q':
                          qflag = 1;
                          break;
                  case 'y':
!                         ttyn = NULL;
                          break;
                  case 'f':
                          fast_reboot = 1;
                          break;
                  case 'p':
--- 1332,1344 ----
                          break;
                  case 'q':
                          qflag = 1;
                          break;
                  case 'y':
!                         /*
!                          * Option ignored for backwards compatibility.
!                          */
                          break;
                  case 'f':
                          fast_reboot = 1;
                          break;
                  case 'p':
*** 1458,1480 ****
  #if 0   /* For debugging */
          if (mdep != NULL)
                  (void) fprintf(stderr, "mdep = %s\n", (char *)mdep);
  #endif
  
-         if (fcn != AD_BOOT && ttyn != NULL &&
-             strncmp(ttyn, "/dev/term/", strlen("/dev/term/")) == 0) {
-                 /*
-                  * TRANSLATION_NOTE
-                  * Don't translate ``halt -y''
-                  */
-                 (void) fprintf(stderr,
-                     gettext("%s: dangerous on a dialup;"), cmdname);
-                 (void) fprintf(stderr,
-                     gettext("use ``%s -y'' if you are really sure\n"), cmdname);
-                 goto fail;
-         }
- 
          if (needlog) {
                  char *user = getlogin();
                  struct passwd *pw;
                  char *tty;
  
--- 1458,1467 ----