Add getopt-compat.h

include/getopt-compat.h

+/*
+ * getopt(3) declarations
+ */
+#ifndef _GETOPT_COMPAT_H
+#define _GETOPT_COMPAT_H
+
+#include <ldap_cdefs.h>
+
+extern char *optarg;
+extern int optind, opterr, optopt;
+
+LDAP_F int getopt LDAP_P((int, char * const [], const char *));
+
+#endif /* _GETOPT_COMPAT_H */