completely avoid usage of strnlen()

config.c

@@ -140,7 +140,7 @@ parse_config(const char *config_file, t_configuration_options * options)
 	fclose(fp);
 
 	/* Check config settings */
-	if (strnlen(options->cluster_name, MAXLEN) == 0)
+	if (*options->cluster_name == '\0')
 	{
 		log_err(_("Cluster name is missing. Check the configuration file.\n"));
 		exit(ERR_BAD_CONFIG);

repmgr.c

@@ -1948,7 +1948,7 @@ copy_remote_files(char *host, char *remote_user, char *remote_path,
 	char		host_string[MAXLEN];
 	int			r;
 
-	if (strnlen(options.rsync_options, MAXLEN) == 0)
+	if (*options.rsync_options == '\0')
 		maxlen_snprintf(
 						rsync_flags, "%s",
 					 "--archive --checksum --compress --progress --rsh=ssh");

strutil.c

@@ -29,17 +29,6 @@ static int
 xvsnprintf(char *str, size_t size, const char *format, va_list ap)
 __attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 0)));
 
-/* Add strnlen on platforms that don't have it, like OS X */
-#ifndef strnlen
-size_t
-strnlen(const char *s, size_t n)
-{
-	const char *end = (const char *) memchr(s, '\0', n);
-
-	return (end ? end - s : n);
-}
-#endif
-
 static int
 xvsnprintf(char *str, size_t size, const char *format, va_list ap)
 {

strutil.h

@@ -43,9 +43,4 @@ extern int
 maxlen_snprintf(char *str, const char *format,...)
 __attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 3)));
 
-/* Add strnlen on platforms that don't have it, like OS X */
-#ifndef strnlen
-extern size_t strnlen(const char *s, size_t n);
-#endif
-
 #endif   /* _STRUTIL_H_ */