Update configure include checks.

src/configure.in

@@ -582,12 +582,10 @@ AC_CHECK_HEADERS(dld.h)
 AC_CHECK_HEADERS(endian.h)
 AC_CHECK_HEADERS(float.h)
 AC_CHECK_HEADERS(fp_class.h)
-AC_CHECK_HEADERS(getopt.h)
 AC_CHECK_HEADERS(history.h)
 AC_CHECK_HEADERS(ieeefp.h)
 AC_CHECK_HEADERS(limits.h)
 AC_CHECK_HEADERS(netdb.h)
-AC_CHECK_HEADERS(netinet/in.h)
 AC_CHECK_HEADERS(readline.h)
 AC_CHECK_HEADERS(readline/history.h)
 AC_CHECK_HEADERS(readline/readline.h)

src/include/config.h.in

@@ -77,9 +77,6 @@
 /* Set to 1 if you have <fp_class.h> */
 #undef HAVE_FP_CLASS_H
 
-/* Set to 1 if you have <getopt.h> */
-#undef HAVE_GETOPT_H
-
 /* Set to 1 if you have <history.h> */
 #undef HAVE_HISTORY_H
 
@@ -92,9 +89,6 @@
 /* Set to 1 if you have <netdb.h> */
 #undef HAVE_NETDB_H
 
-/* Set to 1 if you have <netinet/in.h> */
-#undef HAVE_NETINET_IN_H
-
 /* Set to 1 if you have <readline.h> */
 #undef HAVE_READLINE_H
 

src/interfaces/ecpg/preproc/ecpg.c

@@ -4,9 +4,7 @@
 
 #include "postgres.h"
 
-#if HAVE_GETOPT_H
 #include <getopt.h>
-#else
 #include <unistd.h>
 extern int	optind;
 extern char *optarg;