Move interface-related defines to interfaces.h so we don't have to include

<netinet/in.h> everywhere.

interfaces.h

@@ -0,0 +1,48 @@
+/*
+ *  CU sudo version 1.6
+ *  Copyright (c) 1996, 1998, 1999 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 1, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  Please send bugs, changes, problems to sudo-bugs@courtesan.com
+ *
+ *  $Sudo$
+ */
+
+#ifndef _SUDO_INTERFACES_H
+#define _SUDO_INTERFACES_H
+
+/*
+ * IP address and netmask pairs for checking against local interfaces.
+ */
+struct interface {
+    struct in_addr addr;
+    struct in_addr netmask;
+};
+
+/*
+ * Prototypes for external functions.
+ */
+void load_interfaces	__P((void));
+
+/*
+ * Definitions for external variables.
+ */
+#ifndef MAIN
+extern struct interface *interfaces;
+extern int num_interfaces;
+#endif
+
+#endif /* _SUDO_INTERFACES_H */