Update to 1.12.3.

*** 5,18 ****
  # define _GNU_SOURCE /* strptime(), getsubopt() */
  #endif
  
  #include <stdio.h>
  
! #define HAVE_STRPTIME
! #define HAVE_GETSUBOPT
! #define HAVE_STRLCAT
! #define HAVE_STRLCPY
  
  #include <sys/types.h>
  
  #if !defined(__BEGIN_DECLS)
  #  ifdef __cplusplus
--- 5,15 ----
  # define _GNU_SOURCE /* strptime(), getsubopt() */
  #endif
  
  #include <stdio.h>
  
! #define VERSION "1.12.3"
  
  #include <sys/types.h>
  
  #if !defined(__BEGIN_DECLS)
  #  ifdef __cplusplus
*** 27,44 ****
  #  else
  #  define       __END_DECLS
  #  endif
  #endif
  
! #if defined(__APPLE__)
! # define htobe32(x) OSSwapHostToBigInt32(x)
! # define betoh32(x) OSSwapBigToHostInt32(x)
! # define htobe64(x) OSSwapHostToBigInt64(x)
  # define betoh64(x) OSSwapBigToHostInt64(x)
! #elif defined(__linux__)
! # define betoh32(x) be32toh(x)
  # define betoh64(x) be64toh(x)
  #endif
  
  #ifndef HAVE_STRLCAT
  extern  size_t    strlcat(char *, const char *, size_t);
  #endif
--- 24,43 ----
  #  else
  #  define       __END_DECLS
  #  endif
  #endif
  
! #ifndef HAVE_BETOH64
! #  if defined(__APPLE__)
  #    define betoh64(x) OSSwapBigToHostInt64(x)
! #    define htobe64(x) OSSwapHostToBigInt64(x)
! #  elif defined(__sun)
! #    define betoh64(x) BE_64(x)
! #    define htobe64(x) BE_64(x)
! #  else
  #    define betoh64(x) be64toh(x)
+ #  endif
  #endif
  
  #ifndef HAVE_STRLCAT
  extern  size_t    strlcat(char *, const char *, size_t);
  #endif