openvt: fix gross mismatch between us and "standard" openvt.

  standard one even has different syntax!
  std: "openvt -c 12", we: "openvt 12"
  std: "openvt top", we: complain that "top" is not a number.
openvt: implement -c -w -s (-l -f -v are also accepted but ingnored)

openvt_main                                          188     343    +155
vfork_child                                            -      67     +67
not_vt_fd                                              -      23     +23
packed_usage                                       23932   23952     +20
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 2/0 up/down: 265/0)             Total: 265 bytes
   text    data     bss     dec     hex filename
 801344     641    7380  809365   c5995 busybox_old
 801617     641    7380  809638   c5aa6 busybox_unstripped

1 files changed, 1 insertions, 1 deletions

diff --git a/networking/udhcp/script.c b/networking/udhcp/script.c
index 71f033328..4f4bc253a 100644
--- a/networking/udhcp/script.c
+++ b/networking/udhcp/script.c
@@ -230,7 +230,7 @@ void udhcp_run_script(struct dhcpMessage *packet, const char *name)
                 /* exec script */
                 execle(client_config.script, client_config.script,
                        name, NULL, envp);
-                bb_perror_msg_and_die("script %s failed", client_config.script);
+                bb_perror_msg_and_die("exec %s", client_config.script);
         }
         safe_waitpid(pid, NULL, 0);
         for (curr = envp; *curr; curr++)