remove support for non-ANSI compilation

*** 16,25 ****
--- 16,27 ----
   * fields enclosed by brackets "[]" replaced with your own identifying
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   *
+  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+  *
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   *
   * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
   */
*** 52,62 ****
  
  /*
   * External definitions for
   * functions in inet(3N)
   */
- #ifdef __STDC__
  #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
  extern int inet_net_pton(int, const char *, void *, size_t);
  extern boolean_t inet_matchaddr(const void *, const char *);
  #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
  
--- 54,63 ----
*** 86,113 ****
  extern int inet_aton(const char *, struct in_addr *);
  
  extern uint_t inet_nsap_addr(const char *, uchar_t *, int);
  extern char *inet_nsap_ntoa(int, const uchar_t *, char *);
  
- #else
- unsigned long inet_addr();
- char    *inet_ntoa();
- /*
-  * With the introduction of CIDR the
-  * following 4 routines are now considered to be Obsolete
-  */
- struct  in_addr inet_makeaddr();
- unsigned long inet_network();
- extern unsigned long inet_lnaof();
- extern unsigned long inet_netof();
- 
- extern int inet_pton();
- extern const char *inet_ntop();
- extern int inet_aton();
- 
- #endif
- 
  #ifdef  __cplusplus
  }
  #endif
  
  #endif  /* _ARPA_INET_H */
--- 87,96 ----