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diff -up dhcp-3.0.6/client/dhclient.c.enoi dhcp-3.0.6/client/dhclient.c
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--- dhcp-3.0.6/client/dhclient.c.enoi	2007-08-15 16:14:32.000000000 -0400
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+++ dhcp-3.0.6/client/dhclient.c	2007-08-15 16:17:17.000000000 -0400
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@@ -259,6 +259,9 @@ int main (argc, argv, envp)
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 		} else if (!strcmp (argv [i], "--version")) {
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 			log_info ("isc-dhclient-%s", DHCP_VERSION);
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 			exit (0);
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+		} else if (!strcmp (argv [i], "-x")) {
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+			/* ignored for compatibility */
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+			continue;
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 		} else if (!strcmp (argv [i], "-I")) {
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 			if ((++i == argc) || (argv[i] == NULL) || (*(argv[i])=='\0')) {
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 				usage ();